The Role

We are currently seeking a Senior Staff Backend Software Engineer to join our Portfolio Data Workflows team in Poland. In this role you will lead the design, development, and implementation of scalable and secure products that power our financial data ecosystem. You’ll provide technical leadership, education, and guidance to engineering teams across the organization and recommendations to leadership. You’ll draft and champion strong architectural practices; use them to ensure technical strategic alignment with business objectives as well as to mentor and train engineers.  You’ll identify structural or organizational blockers and technical debt in order to propose and drive solutions, while helping to modernize our architecture to support our expansion into European markets. This position offers exceptional scope for technical leadership in transforming how our global clients interact with and leverage financial data.

Applicants must have legal authorization to work in the country where this role is based on the first day of employment. Visa sponsorship is not available for this position.

What You’ll Do

• Define technology roadmaps and engineering standards; drive adoption with the team and across Addepar
• Design, develop, and implement robust API services to support our rapidly growing European customer base
• Research and drive the adoption of new technologies and best practices to drive innovation
• Analyse and dive deep into a complex and powerful ecosystem, understanding requirements, determining optimal approaches and driving change
• Mentor, coach, and empower other engineers, contributing to an inclusive and high-performing team culture
• Amplify your technical ability by empowering your peers and contributing to code reviews and technical designs
• Proactively identify, prioritize and propose remediation for tech debt
• Debug and troubleshoot issues across the entire application stack
• Collaborate effectively with other engineers, product managers and stakeholders, in line with our company values outlined below
• Be part of a high-performing, cross-functional team
• Troubleshoot and resolve complex technical issues

Who You Are

• You have extensive experience in software development, including building backend services in a professional environment
• You have a deep and expert knowledge of software design patterns, API design, and the software development lifecycle
• Proven ability to influence technical direction and make significant contributions to the architecture of complex, distributed systems that handle data at scale
• Understanding of REST, service-based architecture, and distributed systems
• A rapid learner with robust analytical and problem-solving abilities
• A curious person, who enjoys digging deep into requirements and handling complexity
• You have a track record of amplifying your impact by mentoring other engineers and collaborating effectively within a team of senior peers
• Excellent communication and leadership skills
• Experience building services with Java, SQL and AWS
• Experience with Elasticsearch is a nice-to-have
• Demonstrable knowledge of using AI in a professional engineering environment
• Interest or experience in the financial industry or wealth management in particular

Work with HelloFresh in Warsaw and its HelloTech organisation, HelloFresh’s global technology backbone with more than 1000 people, building the digital products that power our end-to-end food experience. From meal kits and ready-to-eat meals to specialty offerings like pet food and premium meat & seafood, HelloTech creates the platforms that bring tailored food solutions to millions of customers every month.

Our subscription-based, direct-to-consumer model relies on technology at every step, from customer-facing apps and personalization logic to pricing, forecasting, supply chain optimization, and initiatives that help reduce food waste. While our brands operate independently to serve distinct customer needs, they are united by shared platforms, data, and operational excellence built by HelloTech.

HelloTech works in autonomous, cross-functional alliances, each owning a specific product or domain end to end. By working with our Warsaw office, you will help shape scalable, data-driven products used across our markets, working with a modern tech stack and international teams to continuously improve how people discover, order, and enjoy HelloFresh’s products, today and in the future.

About the role: What's in the Box

The Food Systems Alliance at HelloFresh is focused on building and scaling global systems that support the entire food journey, from assortment and ingredient development to supply chain management technology. This includes key domains such as master data management, strategic procurement, applied science (covering areas like menu planning, personalization, forecasting, and operations research), supplier reliability, and inventory planning. With end-to-end ownership of critical supply chain functions, the Alliance enables efficient, consistent, and innovative solutions. This integrated approach supports faster software development, enhanced collaboration, and the delivery of scalable systems across global markets.

As a Senior Backend Engineer in our Food Systems Alliance, you will be responsible for defining, securing, and implementing technical solutions for business problems. You will look after speeding up development, decision-making, and problem-solving. You will work within your team and our neighboring teams to ensure that our efforts aim to achieve a clearer architecture and boundaries between tech teams to support autonomy. You will communicate directly with our business stakeholders and multiple tech teams supporting local markets. You will report to the Engineering Manager in the Ingredient to Product tribe. This role does not include people management responsibilities.

What you’ll do: The Recipe

• Work on of the architecture, design, development, deployment and operations of the microservices you will develop, using DevOps practices, pair programming and other cutting edge methodologies 
• Be active, solution-oriented member of autonomous, cross-functional agile teams collaborating with Product Owners, Front-end Engineers, Designers, and Business Intelligence teams 
• Having an in-depth understanding of HelloFresh’s core product and architecture, and act as ambassador for software solutions offering support and mentorship to colleagues 
• Work with state-of-the-art technologies like Golang, Kafka, Docker, Kubernetes and more
  
  

What you’ll bring: The Ingredients 

• Solid hands-on experience working with AI coding agents (e.g., Claude Code, Cursor, Copilot) beyond casual experimentation. You use AI agents as thought partners to onboard on unfamiliar codebases and navigate new areas of the code with confidence. You have a practical sense of how the context you provide to AI tools - specifications, constraints, examples - shapes output quality, and a developing awareness of how agentic outputs can fail, with growing habits around verifying, testing, and setting boundaries on AI-generated work.
• Strong background in backend development, with a focus on microservices and distributed systems
• Proven ability to build event-driven architectures using messaging technologies such as RabbitMQ, Kafka, or AWS SQS/SNS
• Proficiency in Go is preferred; experience with JVM languages and a willingness to learn Golang is also welcome
• Practical knowledge of Docker, container orchestration tools like Kubernetes, and CI/CD implementation
• Solid foundation in testing practices, including both unit and end-to-end testing
• Deep understanding of relational databases
• Familiarity with MongoDB, Elasticsearch, and/or GraphQL is a plus
  
  

Above all, we are looking for people who will make HelloFresh Group better. We believe there are many different ways of developing skills and we love diverse experiences! So even if you don’t “tick all the boxes” but think you’d thrive in this role, we would really like to learn more about you.

What we offer: The Toppings

• Global collaboration at scale: Collaborate with experienced engineers and product partners across HelloTech’s international teams, in a culture of active knowledge sharing.
• Technology with real-world impact: Build and operate modern systems at global scale, supporting 6+ millions of customers and complex supply chain operations.
• Technical/Product/Design leadership: Drive best practices and influence architecture/design, quality, and ways of working in an autonomous, product-led setup.
• End-to-end development/delivery: Drive decisions from problem definition to production, improving systems and enabling long-term scalability.
• Access to workspace at Warsaw Centre Point. The hub offers modern facilities including showers, breakout zones, outdoor space, cycle parking, and refreshments (coffee, soft drinks, and fruit).

Are you the missing ingredient? If this sounds like a tasty opportunity, we’d be excited to hear from you.  We aim to review your profile and respond within 5 business days.

#Engineering

Work with HelloFresh in Warsaw and its HelloTech organisation, HelloFresh’s global technology backbone with more than 1000 people, building the digital products that power our end-to-end food experience. From meal kits and ready-to-eat meals to specialty offerings like pet food and premium meat & seafood, HelloTech creates the platforms that bring tailored food solutions to millions of customers every month.

Our subscription-based, direct-to-consumer model relies on technology at every step, from customer-facing apps and personalization logic to pricing, forecasting, supply chain optimization, and initiatives that help reduce food waste. While our brands operate independently to serve distinct customer needs, they are united by shared platforms, data, and operational excellence built by HelloTech.

HelloTech works in autonomous, cross-functional alliances, each owning a specific product or domain end to end. By working with our Warsaw office, you will help shape scalable, data-driven products used across 18 countries, working with a modern tech stack and international teams to continuously improve how people discover, order, and enjoy HelloFresh’s products, today and in the future.

—

About the role: What's in the Box

This journey involves keeping HelloFresh a trusted name—someone with a passion for security and an appetite for new challenges. Security Engineers work in a variety of ways to constantly iterate and improve HelloFresh’s security posture.

This role aims to improve the HelloFresh Security Logging & Monitoring Program by maturing the tools, processes, and playbooks to reduce dwell time (indicators of which would be lowered MTTD&R). You will facilitate efficient Incident Detection and Response in AWS cloud and enterprise IT environments.

At HelloTech, flexibility and cross-functional collaboration are core to how we work. While this role is aligned to a specific focus area, strong candidates may also be considered for opportunities across different teams or projects.

What you’ll do: The Recipe

• Responsible for SOC monitoring, use-case building, triage, and advisory using cloud-native SIEM platforms.
• Conduct initial triage of security events and incidents and document progress throughout the Incident Response Lifecycle.
• Automate, optimize, and operate modern security solutions like EDR/EPPs and conventional Firewalls, IDS/IPS, Email Security, VPN, and MDM tools.
• Leverage premium and open-source threat intel feeds to regularly sweep environments against rising APT campaigns.
• Prepare status reports and follow up with the stakeholders through Jira and Incident Mgmt. Platform to close the remediation loop.
• Contribute to the continuous improvement of security logging and monitoring maturity.

What you’ll bring: The Ingredients

• A minimum of 2 years of experience working in mature SOC environments.
• Security monitoring and incident response experience in public cloud environments such as AWS.
• Experience with cloud SIEM & SOAR platforms, DDoS mitigation and prevention tools, and Layer-7 Web-based perimeter security controls.
• Understanding of network intrusion methods, network containment, segregation techniques, and technologies such as Sandboxes and Intrusion Detection/Prevention Systems (ID/PS).
• Ability to operate EDR, EPP, and Device Management solutions as per best security practices.
• Decent programming skills to enable data processing, IaC, and security automations.
• Good communication and reporting skills.
• Experience with log analysis stacks like ElasticSearch, Splunk, or SumoLogic.
• Open to working on-call in rotational shifts.

Above all, we are looking for individuals who will make HelloFresh better. We believe there are many different ways of developing skills and we love diverse experiences! So even if you don’t “tick all the boxes” but think you’d thrive in this role, we would really like to learn more about you.

What we offer: The Toppings

• Global collaboration at scale: Collaborate with experienced engineers and product partners across HelloTech’s international teams, in a culture of active knowledge sharing.
• Technology with real-world impact: Build and operate modern systems at global scale, supporting 6+ million customers and complex supply chain operations.
• Technical/Product/Design leadership: Drive best practices and influence architecture/design, quality, and ways of working in an autonomous, product-led setup.
• End-to-end development/delivery: Drive decisions from problem definition to production, improving systems and enabling long-term scalability.
• Access to workspace at Warsaw Centre Point: The hub offers modern facilities including showers, breakout zones, outdoor space, cycle parking, and refreshments (coffee, soft drinks, and fruit).

Are you the missing ingredient? If this sounds like a tasty opportunity, we’d be excited to hear from you. We aim to review your profile and respond within 5 business days.

#IT & #Security

The Role

We are currently seeking a Staff Backend Software Engineer to join our Portfolio Data Workflows team in Poland. In this role, you'll be at the forefront of designing, implementing and maintaining critical API services that power our financial data ecosystem, while helping to modernize our architecture to support our expansion into European markets. You'll have the opportunity to shape the future of our platform by implementing robust solutions that scale across multiple regions, enhance user experiences, and ensure compliance with European and international financial regulations. This position offers exceptional scope for technical leadership in transforming how our global clients interact with and leverage financial data.

Applicants must have legal authorization to work in the country where this role is based on the first day of employment. Visa sponsorship is not available for this position.

What You’ll Do

• Design, develop, and implement robust API services to support our rapidly growing European customer base
• Lead architecture designs and product roadmap creation
• Research and drive the adoption of new technologies and best practices to drive innovation
• Analyse and dive deep into a complex and powerful ecosystem, understanding requirements, determining optimal approaches and driving change
• Mentor, coach, and empower other engineers, contributing to an inclusive and high-performing team culture
• Amplify your technical ability by empowering your peers and contributing to code reviews and technical designs
• Debug and troubleshoot issues across the entire application stack
• Collaborate effectively with other engineers, product managers and stakeholders, in line with our company values outlined below
• Be part of a high-performing, cross-functional team

Who You Are

• You have extensive experience in software development, including building backend services in a professional environment
• You have a deep and expert knowledge of software design patterns, API design, and the software development lifecycle
• Proven ability to influence technical direction and make significant contributions to the architecture of complex, distributed systems
• Understanding of REST, service-based architecture, and distributed systems
• A rapid learner with robust analytical and problem-solving abilities
• A curious person, who enjoys digging deep into requirements and handling complexity
• You have a track record of amplifying your impact by mentoring other engineers and collaborating effectively within a team of senior peers
• Experience building services with Java, SQL and AWS
• Experience with Elasticsearch is a nice-to-have
• Demonstrable knowledge of using AI in a professional engineering environment
• Interest or experience in the financial industry or wealth management in particular

Why this role exists:

We are looking for an Engineering Manager to lead engineering teams within the Sports Business Unit, responsible for delivering all sports betting content and functionality for our B2B platform. The Sports BU owns end-to-end development of sports-related capabilities, including trading, feeds, risk management, mathematical models, odds services, and sportsbook content. This role combines people leadership, technical delivery ownership, and cross-functional collaboration with Product, Trading, and Platform teams to ensure scalable, reliable, and high-performance sportsbook solutions.

What you’ll drive:

Team management & people development

• Conduct regular performance evaluations, provide constructive feedback, and create development plans for team members.
• Address and resolve any conflicts or issues within the team promptly.
• Foster a collaborative environment where team members feel comfortable voicing their concerns.
• Provide training and development opportunities for team members to enhance their skills.
• Organize workshops, seminars, and other learning activities to keep the team updated with the latest technologies and best practices.

Project planning & delivery management

• Define project scope, goals, and deliverables in collaboration with stakeholders.
• Create detailed project plans, including timelines and resource allocation.
• Efficiently allocate resources to meet project demands and balance team workloads.
• Manage team schedules, including handling time-off requests and ensuring adequate coverage.

Quality assurance & technical governance

• Implement and enforce quality assurance processes and standards within the team.
• Ensure thorough testing and validation of deliverables before release.
• Review and approve technical designs, architecture, and code to maintain high-quality standards and ensure consistency.
• Ensure proper documentation of technical designs, system architecture, and code.
• Maintain comprehensive documentation for future reference and knowledge sharing.

Process improvement & best practices

• Continuously seek ways to improve quality and efficiency in development processes.
• Promote agile methodologies and other best practices for software development.
• Identify areas for improvement in team processes and workflows. Implement changes to enhance efficiency, productivity, and quality.
• Promote the adoption of best practices in software development, including agile methodologies and lean processes.
• Track and analyze key performance metrics to identify trends and opportunities for improvement.

Communication & stakeholder management

• Act as the primary point of contact between the team and upper management, as well as other departments.
• Facilitate effective communication and collaboration within the team and across the organization.
• Report on team progress, challenges, and successes to stakeholders and management.
• Ensure transparency and alignment between team efforts and business goals.

What makes you a GR8 fit:

Must-have

• Experience in the betting / trading domain.
• Strong experience with C# / .NET in building scalable, high-load backend systems.
• Experience designing distributed systems and microservices architectures.
• Solid knowledge of event-driven architecture and messaging systems (Kafka or similar).
• Strong expertise in databases (SQL + NoSQL), including performance tuning and scaling.
• Experience with CI/CD, Docker, and Kubernetes.
• Ability to make architectural decisions and take ownership end-to-end.
• Experience operating high-availability, low-latency systems.

Nice-to-have

• Experience with Orleans, MongoDB, RabbitMQ, Elasticsearch, Aerospike.
• Experience with AWS or other cloud platforms.
• Familiarity with observability tools (APM, logging, tracing).
• Understanding of FinOps / cloud cost optimization.
• Previous experience mentoring or leading engineers.

Highlights:

• Role: Director of Product
• Location: Remote (core hours 9:00–18:00 CET)
• Languages: Fluent English (C1) and Russian (Native)
• Travel: Regular travel to customers, conferences, and the U.S.
• Reports to: VP of Product

About Fundraise Up

We’re Fundraise Up - a global fundraising platform built to make donating to nonprofits fast, seamless, and accessible to all. Every month, our technology powers tens of millions of dollars in donations across the globe. We focus on innovation that directly impacts results: faster load times, higher conversion rates, global payment support, and accessibility-first design.

Our platform is trusted by many of the world’s leading nonprofits, including UNICEF, the Alzheimer’s Association, and a wide range of global NGOs. With a 4.9/5 rating across top software review platforms, we’re recognized not just for our impact - but for the quality of the product we deliver.

A Truly Global Product

We operate in the enterprise segment, serving nonprofit organizations across North America, the United Kingdom, Australia, and Europe.

We’re building a large and complex product ecosystem that serves nonprofits, donors, and partners around the world. The platform includes a modern checkout experience and customizable widgets (each a standalone SPA), donor, organization, and partner portals, admin tools, and several internal apps.

Our backend is powered by Node.js (Koa, NestJS) and MongoDB. The frontend stack includes Webpack, Vue.js, and React, with nearly all code written in TypeScript. For high-throughput messaging and background processing, we use Kafka (for millions of events) and Bull (Redis). Analytics data is stored in ClickHouse, and we use Elasticsearch for search.

The Team

We are a distributed team of 160+ product professionals. Our team members are mainly based across Spain, Poland, Portugal, Georgia, Armenia, Serbia, Turkey, and Cyprus.

Despite our scale, we operate like a focused team - where every task matters and every voice is heard. We value thoughtful collaboration, strong engineering practices, and a product mindset. Biweekly engineering forums give space to share learnings and celebrate technical achievements. You’ll be joining a team where quality, mentorship, and mutual respect come first.

About the role

As Director of Product, Core Markets, you will own the strategy and execution that positions Fundraise Up as the category leader in key nonprofit verticals. You’ll lead and grow a team of Product Managers, collaborate tightly with Sales, GTM, and Customer Success, and engage directly with senior nonprofit executives on complex, enterprise-scale deals. This is a hands-on, results-driven role — you will set bold vision, raise the bar on execution, and drive measurable revenue growth and market dominance.

What “Core Markets” means here

Core Markets represent the priority verticals where Fundraise Up has established strong traction and significant growth potential — including large Tier 1 & Tier 2 nonprofits across Cause & Cure, Faith-based, and adjacent segments. Your mandate: position Fundraise Up as the partner of choice and default platform within these key markets.

Key Responsibilities

Market & Customer Leadership

• Develop deep expertise in Core Markets — understand segments, buying behaviors, procurement and RFP patterns, compliance requirements, and the key barriers to adoption.
• Drive continuous discovery — conduct executive interviews, site visits, and industry events, translating insights into clear “must-haves” versus differentiators for each vertical.
• Own strategic enterprise deals — present the product vision, address objections, and collaborate with the Go-to-Market team to co-create scalable, enterprise-grade rollout plans.

Portfolio Strategy & Outcomes

• Define and own the Core Markets strategy and multi-quarter roadmap across verticals; articulate crisp bets with quantified business cases.
• Balance scale vs. customization: protect product integrity while unlocking enterprise wins (no “zoo” of one-offs).
• Set and deliver against OKRs that tie directly to revenue and adoption (ARR growth, win-rate, NRR, adoption of key capabilities).

Team Leadership

• Hire, mentor, and inspire 2–5 PMs (vertical leads). Build a culture of ownership, curiosity, and high accountability.
• Establish operating rituals (discovery cadence, metrics reviews, launch playbooks) that scale learning and delivery.
• Grow leaders: coach PMs to manage their own cross-functional pods and represent the product credibly with enterprise customers.

GTM & Cross-Functional Partnership

• Operate as a true partner to Sales, Solutions, CS, and Marketing: equip teams with product narratives, competitive angles, and clear boundaries.
• Lead cross-functional execution with Engineering, Design, and Analytics to ship impactful, reliable capabilities on time.
• Communicate trade-offs with executive clarity; make decisions, document rationale, and keep stakeholders aligned.

Skills and Qualifications

• 10+ years in Product Management, with 3+ years leading PMs (managing managers or multiple PMs across areas).
• Enterprise B2B experience (SaaS/fintech/payments/e-commerce or adjacent), including pre-sales/RFPs and complex stakeholder management.
• Proven discovery & execution track record: from insight → business case → delivery → measurable impact.
• Metrics fluency: ARR, NRR, win-rate, conversion, adoption, time-to-value; strong analytical and decision-making skills.
• Communication: C1/C2 English—clear, confident, and persuasive with executives and cross-functional teams.
• Travel-ready: comfortable with regular customer visits and conferences (including the U.S.).

Bonus points

• Experience in nonprofit, giving, or payments (compliance, risk, donor experience).
• History of building vertical toolkits/solutions that scale across enterprise accounts.

What Great Looks Like in 12 Months

• Significantly improved win rate in our core markets.
• 80%+ of release expectations achieved.
• Clear narrative and playbooks for the field: why we win, where we don’t, what to say “no” to—and why.
• Team operating system in place: quarterly strategy reviews, robust discovery pipeline, and predictable delivery.

Director-Level Behaviors We Expect

• Accountable & reliable: owns outcomes, not just plans.
• Empathetic & relentlessly curious: keeps digging until root causes and workable solutions are found.
• Executive presence: confidently challenges and influences senior nonprofit leaders; commands the room with clarity and respect.
• Sales-friendly, product-centric: partners with GTM while protecting long-term product leverage.
• Resourceful & persistent: never stuck—always finds the next path forward with urgency.

Why work with us

• A strong, collaborative product team that owns what it builds
• Clear product vision and access to real customer feedback from global nonprofit leaders
• Flat structure: no politics, just great work with great people
• Transparent company culture-we share how we’re growing, where revenue comes from, and what’s next
• Long-term focus: we offer equity options and value sustained, meaningful contribution

Benefits

• 31 days off
• 100% paid telemedicine plan
• Home Office Setup Assistance: the company offers assistance with purchasing furniture (office chair, office desk, monitor) and other items to create a comfortable workspace.
• English learning courses
• Relevant professional education
• Gym or swimming pool
• Co-working
• Remote working.

_{**Please note: All official correspondence from Fundraise Up will exclusively originate from the @fundraiseup.com domain. Exercise caution and ensure the authenticity of emails claiming to be from our company.}

About Sezzle:

With a mission to financially empower the next generation, Sezzle is revolutionizing the shopping experience beyond payments, blending cutting-edge tech with seamless, interest-free installment plans that make shopping smarter and more accessible. We’re not just transforming payments; we’re redefining how people discover, interact with, and purchase the things they love while driving real impact on merchant sales through increased conversions and higher order values. As we continue to shape the future of fintech and retail, we’re building an innovative, dynamic team passionate about creating more than just a transaction but a truly unique shopping journey. If you’re excited about pushing boundaries in tech and delivering a game-changing experience for consumers and merchants alike, come join us at Sezzle and help create the future of shopping!

About the Role: 

We are seeking a talented and motivated Senior Software Engineer who is best in class with a high IQ plus a high EQ. This role presents an exciting opportunity to thrive in a dynamic, fast-paced environment within a rapidly growing team, with abundant prospects for career advancement.

As a Senior Software Engineer with Sezzle, you will work with a highly-motivated team to tackle interesting and challenging problems across multiple areas of the organization. Your experience and guidance will help other members of the team level-up their own skills as well.

In this backend focused role, you will work closely with stakeholders from Product, Support and the business. You’ll also partner with other engineering teams to provide high-quality, scalable, and innovative solutions to internal and customer problems. Your day-to-day responsibilities will include designing, developing, and delivering new features, as well as unblocking and mentoring your teammates.

This role has both an internal and external focus, your contributions will make a meaningful difference in the day-to-day lives of your peers at Sezzle, enhancing their ability to support our business and customers, and you will have opportunities to take any feedback and iterate.

Interview Process

We believe transparency is important at Sezzle. Regularly providing feedback while setting expectations is part of our culture starting with the interview process. Advancement through each step is not guaranteed.

• Application submitted (you are here)
• Wonderlic test (30-40 min)
• Coding assessment (~1.5 hours)
• Interview with recruiters (30 min)
• Interview with engineers (1 hour)
• Interview with engineering leadership (30-45 min)
• Offer!

What you'll do: 

• Design software applications and features in Golang and React
• Help build out a distributed architecture, creating solutions that work within it, maintaining consistency while scaling highly
• Coordinate with internal company stakeholders to design market winning products
• Develop and collect metrics to drive continuous improvement of existing products
• Deliver high quality features which can be tested and adheres to reporting standards
• As needed, lead small development teams to bring a project to market
• Mentor other engineering teammates to help elevate their experience and knowledge

What We Look For: 

• At least 7 years of full-stack software engineering experience
• Experience bringing new ideas and building consensus on the path forward
• Experience with building and serving REST APIs using Go (preferably) and Java Python or a similar language.
• Experience working in a distributed, cloud-based architecture, with either design patterns like transactional outboxes, or queuing tools like RabbitMQ, SQS, Kafka
• BS in Computer Science or similar degree.

Preferred Knowledge and Skills:

• Experience with SQL based RDMS through an ORM tool
• Comfortable using observability platforms like Prometheus, or vendor solutions like NewRelic or Datadog to instrument your code for production monitoring and alerting.
• DevOps experience with CI/CD pipelines
• Familiarity with containerized micro-service architecture deployed with Kubernetes on AWS
• Demonstrated history of delivering commercial APIs and web applications
• A clear record of getting products to market and prioritizing solutions and improvements based on stakeholder/customer feedback.

About You: 

• You have relentlessly high standards - many people may think your standards are unreasonably high. You are continually raising the bar and driving those around you to deliver great results. You make sure that defects do not get sent down the line and that problems are fixed so they stay fixed.
• You’re not bound by convention - your success—and much of the fun—lies in developing new ways to do things
• You need action - speed matters in business. Many decisions and actions are reversible and do not need extensive study. We value calculated risk-taking.
• You earn trust - you listen attentively, speak candidly, and treat others respectfully.
• You have backbone; disagree, then commit - you can respectfully challenge decisions when you disagree, even when doing so is uncomfortable or exhausting. You have conviction and are tenacious. You do not compromise for the sake of social cohesion. Once a decision is determined, you commit wholly.
• You deliver results - you focus on the key inputs and deliver them with the right quality and in a timely fashion. Despite setbacks, you rise to the occasion and never settle.

Sezzle’s Technology Stack:

• Languages: Golang, Typescript, Python
• Frontend: Typescript - React and React Native
• Backend: Golang
• Database: MySQL, Postgres, Elasticsearch
• DevOps & Cloud: AWS, Kubernetes
• Version Control: Git
• CI/CD: Gitlab
• Testing: Developer-driven, focus on automated unit, integration, and end-to-end tests
• Sezzle is focused on using open source, and we build what we can before buying!

What Makes Working at Sezzle Awesome? 

At Sezzle, we are more than just brilliant engineers, passionate data enthusiasts, out-of-the-box thinkers, and determined innovators; we are skilled musicians, yogis, cyclists, chefs, golfers, dog-lovers, and rock-climbers. We believe in surrounding ourselves with not only the best and the brightest individuals, but those that are unique and purpose-driven in all that they do. Our culture is not defined by a certain set of perks designed to give the illusion of the traditional startup culture, but rather, it is the visible example living in every employee that we hire. 

#Li-remote #Full-time

About Sezzle:

With a mission to financially empower the next generation, Sezzle is revolutionizing the shopping experience beyond payments, blending cutting-edge tech with seamless, interest-free installment plans that make shopping smarter and more accessible. We’re not just transforming payments; we’re redefining how people discover, interact with, and purchase the things they love while driving real impact on merchant sales through increased conversions and higher order values. As we continue to shape the future of fintech and retail, we’re building an innovative, dynamic team passionate about creating more than just a transaction but a truly unique shopping journey. If you’re excited about pushing boundaries in tech and delivering a game-changing experience for consumers and merchants alike, come join us at Sezzle and help create the future of shopping!

Interview Process

We believe transparency is important at Sezzle. Regularly providing feedback while setting expectations is part of our culture starting with the interview process. Advancement through each step is not guaranteed.

• Application submitted (you are here)
• Wonderlic test (30-40 min)
• Coding assessment (~1.5 hours)
• Interview with recruiters (30 min)
• Interview with engineers (1 hour)
• Interview with engineering leadership (30-45 min)
• Offer!

About the Role: 

We are seeking a talented and motivated Software Engineer II who is best in class with a high IQ plus a high EQ. This role presents an exciting opportunity to thrive in a dynamic, fast-paced environment within a rapidly growing team, with abundant prospects for career advancement. As a Software Engineer II, you will be responsible for solving our most challenging problems along with a highly-motivated team. In this role, you will work closely with other engineers across multiple teams to provide high-quality, scalable, and innovative products. Your day-to-day responsibilities will include partnering with other engineers to design, develop, and deliver new features. As your skills grow so will the size and scope of the projects which you’ll be involved in. Sezzle has a strong culture for promotion with defined paths through Engineering that matches all levels. You’ll be working as part of a full-stack Engineering team which has varied disciplines.

Key Role Responsibilities: 

• Build and maintain new innovative product features focused on actively learning new areas of the product
• Collaborate with owners for different product features to gain insight and offer constructive suggestions for improvements
• Be an active participant in design/architecture discussions sharing your ideas while building the next generation of features for the Sezzle platform  
• Hands-on with our codebase and a contributor to code reviews
• Mentor other engineers who are starting along their career path
• Work with the team to continuously build and deploy scalable solutions
• Assist in planning, estimations, and completion for projects brought up by the team stakeholders

Minimum Requirements: 

• Experience solving technical problems as part of a team
• Bachelor's in computer science (required)
• Familiarity with modern Frontend Development, with React experience preferred
• Ability to solve problems with backend-focused languages like Go or similar compiled statically typed language
• Intermediate understanding of relational databases like MySQL

Preferred Knowledge and Skills:

• Knowledgeable in writing automated tests for applications (unit, integration, end-to-end)
• Familiar with the basic principles and design of RESTful APIs
• Basic knowledge of a Microservice Architecture
• Close familiarity with software engineering tools, software development methodology, and release processes

About You: 

• You have relentlessly high standards - many people may think your standards are unreasonably high. You are continually raising the bar and driving those around you to deliver great results. You make sure that defects do not get sent down the line and that problems are fixed so they stay fixed.
• You’re not bound by convention - your success—and much of the fun—lies in developing new ways to do things
• You need action - speed matters in business. Many decisions and actions are reversible and do not need extensive study. We value calculated risk-taking.
• You earn trust - you listen attentively, speak candidly, and treat others respectfully.
• You have backbone; disagree, then commit - you can respectfully challenge decisions when you disagree, even when doing so is uncomfortable or exhausting. You have conviction and are tenacious. You do not compromise for the sake of social cohesion. Once a decision is determined, you commit wholly.
• You deliver results - you focus on the key inputs and deliver them with the right quality and in a timely fashion. Despite setbacks, you rise to the occasion and never settle.

Sezzle’s Technology Stack:

• Languages: Golang, Typescript, Python
• Frontend: Typescript - React and React Native
• Backend: Golang
• Database: MySQL, Postgres, Elasticsearch
• DevOps & Cloud: AWS, Kubernetes
• Version Control: Git
• CI/CD: Gitlab
• Testing: Developer-driven, focus on automated unit, integration, and end-to-end tests
• Sezzle is focused on using open source, and we build what we can before buying!

What Makes Working at Sezzle Awesome? 

At Sezzle, we are more than just brilliant engineers, passionate data enthusiasts, out-of-the-box thinkers, and determined innovators; we are skilled musicians, yogis, cyclists, chefs, golfers, dog-lovers, and rock-climbers. We believe in surrounding ourselves with not only the best and the brightest individuals, but those that are unique and purpose-driven in all that they do. Our culture is not defined by a certain set of perks designed to give the illusion of the traditional startup culture, but rather, it is the visible example living in every employee that we hire. 

#Li-remote 

#Full-time

What Is The Role : 

Developers and community matter. Our users and contributors have helped ensure that the Elastic Stack (including Elasticsearch, Kibana, Beats, and Logstash) is more than just code — they are open source projects that people love to use.

We’re looking for someone who can connect with our global audience through creative, educational, and visually engaging content. You don’t need to be a Senior Engineer — but you should have a strong technical foundation, curiosity to learn, and the skills to tell compelling stories about technology.

Your work will combine writing, visuals, and video — with no waiting on others to get it done. From drafting a Twitter thread in the morning to publishing an infographic and editing a short video in the afternoon, you’ll take ideas from concept to launch, end to end.

What You Will Be Doing:

• Create engaging technical content for social media, blogs, and YouTube, covering Search, AI, and Elasticsearch in ways that are approachable and inspiring. Topics range from foundational and evergreen topics to today's LLM release.
• Write short-form content (Twitter threads, LinkedIn posts) that distills complex concepts into clear, shareable insights.
• Produce simple, high-quality videos and infographics yourself — from scripting and recording to editing and publishing.
• Explore new trends in Search, AI, and developer tools, and translate them into content our audience cares about.
• Build demos and examples to support your content or share the highlights of the latest research papers.
• Add a creative spark to Elastic’s content to keep our community engaged and draw in new audiences.

What You Bring : 

• Solid technical background and experience in an engineering role.
• Demonstrated ability to create a variety of content formats: blog posts, social media threads, videos, infographics.
• Comfortable working independently and seeing projects through from idea to publication without waiting on others.
• Curiosity and adaptability to quickly pick up new tools and topics.
• A collaborative mindset and willingness to share ideas, in a fully distributed team.
• Strong written and spoken communication skills in English.

What Is The Role:

We are on the lookout for a Senior Software Developer to join our Elasticsearch - Distributed Systems team and focus on how Elasticsearch provides scale, performance, and resilience. This team owns how nodes in an Elasticsearch cluster communicate, and how data are indexed, allocated, and replicated across nodes. 

What You Will Be Doing:

• Improving Elasticsearch’s components that support concurrent and consistent indexing across multiple machines.
• Maintaining our cluster coordination system to keep performance high even though nodes come and go from the cluster and data moves around, while maintaining the safety and liveness properties of the system as a whole.
• Pushing the limits on the number of shards, nodes, and petabytes that Elasticsearch can handle today
• Looking into all kinds of issues, including performance or concurrency issues, and proposing solutions.
• Supporting our support engineers with the harder problems.

What You Bring:

• A strong background in distributed systems and consensus algorithms.
• You have strong skills in core Java and are conversant in the standard library of data structures and concurrency constructs, as well as newer language features.
• You have a deep technical proficiency in algorithms.
• You have shown your ability to understand and work on complex, highly distributed systems.
• You demonstrate the ability to build and debug features with a broad impact, running on multiple machines.
• You are able to own projects from beginning to end. This covers both technical design and working with others to develop needed components.

Bonus Points:

• Data stores
• Search, analytics, Lucene
• Strong knowledge of the JDK
• Asynchronous event-driven network frameworks such as Netty

What Is The Role:

As part of the Platform Engineering department, the Traffic team is crafting, building, and improving the multi-cloud platform at scale for Elastic Cloud Hosted and Serverless. We grow and mature our distributed network services and solutions for multiple cloud service provider platforms. We are built on Kubernetes, Go/Scala, and custom orchestration architectures. In your daily life with us, you will participate in coding, innovating technical designs, crafting solutions, improving resilience, and prioritizing security, bug fixes, and features. For example, Debugging Azure Networking for Elastic Cloud Serverless is part of our efforts, and we want your experience to contribute to a truly exceptional customer experience!

What You Will Be Doing:

• Taking an engineering approach in leading technical initiatives for automating network engineering efforts to guarantee the reliability of the global Elastic infrastructure. .
• Growing our global Platform infrastructure to meet the increasing scaling demands by developing and maintaining software, codebases, tooling and automations.
• Collaborating in an environment with an inclusive approach, and focusing on operational perfection which uplifts others.
• Preventing repeated customer impact in response to major incidents and prioritised problem management. Our on call rotation is spread well, and we address complex customer concerns too.

What You Bring:

• 10+ years in Software Engineering with product success in delivering Cloud network solutions. You collaborate with engineers as an authority in identifying, implementing and delivering solutions. Experience in public cloud, Go and managed Kubernetes services is advantageous.
• Success and lessons of experiences from striving for 'progress not perfection' in the name of Platform reliability. We want to hear about your customer first approach in solving operational problems for both today and the future.
• Passion for developing solutions that involve inclusive communication methods to grow and strengthen partner and team relationships. Examples of working in distributed teams or working remotely is desirable.

Bonus Points:

You don't need to have all of these items, but these represent the types of work you will do as a Software Engineer at Elastic.

• You have designed and built a SaaS product in a public cloud ideally built using Infrastructure-as-Code tooling such as Crossplane or Terraform
• You have built Kubernetes-at-scale infrastructure, ideally across multiple cloud providers, and the vital automation to support it.
• You have written product features or functions in Golang or other programming languages.
• You have worked with containerized services (such as Docker.)
• You have proven results in leading and improving cross-team engineering initiatives.
• You have experience in system administration with professional skills in Linux on distributed systems at scale.
• You have diagnosed or designed, implemented and created solutions with the Elastic Stack.
• You are experienced in a self-organizing and sharing in a globally distributed team environment.
• You strengthen team members in bringing out the best of each other by uplifting others with coaching and mentoring.

About Shelf

Shelf builds software that helps enterprises make AI work in the real world. That only works when our systems are secure, observable, and maintainable under real production pressure.

About the Role

This role is for a senior backend engineer who will focus full-time on security work.

We are looking for a hands-on engineer who can improve our security posture by changing real systems, fixing real problems, and following through until the work is fully implemented and maintained.

This role is embedded close to support and operational engineering, so it stays connected to real incidents, real customer impact, and real follow-through. The scope is broader than one team. You will work across the company’s engineering surface wherever security work needs to land.

Our backend stack includes TypeScript/Node.js, AWS and Azure, PostgreSQL/Aurora, DynamoDB, Elasticsearch, S3, queues, observability tooling, CI/CD, and infrastructure-as-code. Exact stack match matters less than backend depth, security judgment, and learning speed.

Poland remote, with travel for onboarding and a few planned in-person collaboration sessions per year.

What You Will Own

• Find and fix concrete security issues in production systems.
• Improve token lifecycle, revocation, auth flows, auditability, and access controls across backend systems.
• Reduce or eliminate security-sensitive data exposure in logs, events, traces, and internal tooling.
• Improve security detection, logging, and audit trails so incidents are easier to detect, investigate, and contain.
• Rotate secrets, reduce long-lived credentials, tighten access, and relentlessly follow through on overdue security hygiene work.
• Review security findings from scanners and assessments, separate signal from noise, fix valid issues quickly, and improve the underlying architecture where needed.
• Sweep broadly when necessary, including across many repositories and services, rather than stopping at local ownership boundaries.
• Contribute to AI-security and modern application-security work where relevant, including risks introduced by new AI initiatives.
• Write useful technical documentation, post-incident follow-ups, and implementation notes that help security work stay real after the first fix lands.

What Strong Performance Looks Like

• Security improvements actually land in production and stay maintained over time.
• Important follow-through work does not get dropped because it is tedious, cross-cutting, or spread across many repos.
• You can tell the difference between a theoretical issue and a real one, and you act with urgency when the risk is real.
• Incidents lead to better systems, tighter controls, and faster detection instead of only better wording in a document.
• Teams trust you because you improve security through pragmatic implementation and follow-through.

What We Are Looking For

• Strong senior-level backend engineering experience in production systems.
• Real hands-on experience implementing security improvements in code, infrastructure, or operational workflows.
• Experience with application-security topics such as auth, token handling, access control, audit trails, logging, secrets, vulnerability remediation, or incident follow-through.
• Strong debugging and investigative instincts. You can trace ugly real-world issues through code, logs, and system behavior.
• Comfort working across many services and repositories when the problem requires a broad sweep.
• Ability to go from problem statement to implementation to enforcement with real ownership.
• Clear written and verbal communication. You can explain risk, trade-offs, and follow-up work without hiding behind vague security language.
• AI-native working style. You already use AI tools in your daily engineering workflow and know how to verify their output.

Strong Plus

• Experience improving security posture after real incidents or near-miss events.
• Experience with AI-security, OWASP LLM frameworks, or securing LLM-enabled systems.
• Experience improving queryability, logging, and forensic visibility for incident response.
• Experience moving systems from weak defaults to safer patterns such as stronger token handling or better credential models.

How We Evaluate Fit

We care most about implementation, enforcement, and follow-through. If you are the kind of engineer who sees a real security gap and closes it across the codebase, we want to talk.

What Shelf Offers:

• B2B contract.
• Company Stock Options.
• Hardware: MacBook Pro.
• Modern technical stack. Develop open-source software.
• GitHub Copilot subscription.
• Access to Claude Code, OpenAI Codex, TypingMind, and MCP Servers.

Why Shelf:

• Our Leadership Team has deep knowledge management and AI domain expertise and enterprise SaaS background to execute this plan
• We love our customers and our customers love us. Ask a Shelf customer why, and they’ll tell you it’s because of our innovative capabilities, rock-solid reliability, they truly enjoy working with our people, but most of all – it’s the improvements they see in their business KPIs.
• We have raised over $60 million in funding and our investors include Tiger Global, Insight Partners, Connecticut Innovations, and others
• We have high velocity growth powered by the most innovative product in our category, 3X growth for 3 years in a row
• We now have over 100 employees in multiple U.S. states and European countries, and we have ambitious hiring goals over the next few months

Our Values:

Quality - We’re united by our focus on world‑class Quality. Quality in all things – starting with everything that leaves your desk. Everything you touch – every email, report, campaign, and piece of code – should be outstanding. Your work product should blow people away. Having people look at what you’ve done and say, “Wow.” That’s the standard here. Remember that how you do anything is how you do everything. Focus on craftsmanship—your ability to make things better.

Momentum - for us means that you should know that the things you’re responsible for are moving forward. When you look around and see something that’s stalled, get it moving again. We pride ourselves on “ball movement.” When your boss or team leaves you with something, they should return to see measurable progress. Small, continuous movement is our recipe for success. Constantly look for how to make the work around you move forward. We want you to initiate solutions, ideas, and progress. Don’t wait for it to come to you—reach out and create movement. All the time.

Accountability - We expect every team member to feel that they are accountable for more than anyone might normally expect. Each of us should feel real responsibility for things even at the edge of our control. We consistently share and align on expectations, give each other open and respectful feedback, and use those two drivers to ensure that every agreement we make with one another is clear and complete.

Hard Work - We’re here to do something difficult together. We care intensely about the mission and we expect that from our teammates. That care means that we work hard here. Hard work comes with long hours, extra effort…and real opportunity at Shelf. Your passion for creating and sustaining output is a part of our DNA. Support each other, cheer each other on, drive the mission forward. Great teams sustain intense effort together to win.

Learning Agility - We’re innovating in one of the fastest‑moving spaces in history at a time of accelerating global change. That’s incredibly exciting and requires each of us to commit fully to learning each and every day so that we can be the best at what we do. None of us know everything. All of us can learn anything. Staying open and constantly curious is a key success driver at Shelf. It also requires humility. We prize people who are consistently humble and open to making mistakes and growing from them. Recognize also that learning itself is a skill…we need you to be really good at it. Keep dialing in your own understanding about how you learn best and push yourself to keep growing.

Adapt and Thrive - Overcoming challenges lives deep in our DNA. We have a proud history of understanding and living the reality that obstacles are our opportunities…they’re the key to our success. Change is a constant in our business and fighting change is counterproductive. We need you to be good at being uncomfortable and understand that discomfort is the key to growth. Cultivate your own ability to adapt and know that struggling well is something you’ll share with every team you’re on at Shelf. Our company stories are about thriving through real difficulty…together.

Win Together - We win or lose as a team. Always. Everything you do here is connected to the rest of the organization. Part of our shared team environment demands full honesty…real candor and directness with one another. We expect you to constantly be thinking about how to support your teammates and the company, always acting in service to our shared mission and what’s best for the organization as a whole.

#LI-VM1
#LI-Hybrid

ABOUT THE ROLE 

We are looking for a passionate Backend Software Engineer who is enthusiastic about building scalable and performant backend services. You will be on the team that creates and expands Peloton’s e-commerce presence on the web, retail and other sales channels. You’ll build out the services and the infrastructure that delivers delightful experiences to Peloton’s passionate member community. Your work will positively impact the ability of members to interact and engage with Peloton’s ecommerce platform in new and meaningful ways. 

YOUR DAILY IMPACT AT PELOTON 

• Adhere to the highest engineering quality standards to ensure that systems are traceable, reliable, performant and scalable 
• Develop new backend features to support the delivery of experiences within Peloton’s products ● Build internal infrastructure and tooling as needed to support product features ● Work within an agile development environment with peer engineers, designers, and product 

managers on a daily basis to scope, develop and deliver a software experience that realizes the product strategy 

• Be a part of a positive and inclusive culture that is hyper-focused on cultivating engineer growth and learning 

YOU BRING TO PELOTON 

• 4+ years of software engineering experience 
• Experience with Java, Kotlin, Python or similar languages 
• Experience building and scaling out RESTful microservices 
• Familiarity with accessing, querying and writing to data stores like PostgreSQL, MongoDB, DynamoDB, Elasticsearch, etc. 
• Experience with Spring Boot, Docker, Kubernetes, gRPC, GraphQL 
• Experience in Unit Testing/Test Driven Development 
• Experience in cloud infrastructure like AWS/GCP 
• Solid understanding of git workflows in GitHub or similar git-based version control systems ● Support configuring and developing solutions for CI/CD with experience with tools like Github Actions, Jenkins, CircleCI or similar 
• Experience developing dashboards and sifting testing insights using tools like Datadog or similar observability tools 
• Ability to accomplish complex engineering tasks independently and capacity to work in a high growth, fast-paced environment 
• Experience working on an ecommerce platform is a bonus

SENIOR FULL STACK SOFTWARE ENGINEER, DEVICE SERVICES 

ABOUT THE ROLE

We are looking for a Senior Full Stack Software Engineer - a strong front end/back end developer - to join our team. You will be working within an agile scrum team and building Device Management features to support every Peloton Connected Fitness Device. You are a hybrid API/web developer who is comfortable moving back and forth between the front and back end.

You are someone who thinks about simplicity and works to provide solutions that reduce the complexity across services. You are team-focused and prioritize collective learning in addition to solving problems. You build collective ownership amongst the team by contributing to code reviews, designs, whiteboarding, and pair-programming. 

YOUR DAILY IMPACT AT PELOTON:

• Work on different technologies across API and the Web within an agile development environment.
• Responsible for iterating on the process, technology, and communication with peer engineers, designers, and product managers on a daily basis to scope, develop and deliver a software experience
• Be a technical leader within the team you work with and within Peloton in general. Able to identify common patterns as well as develop and foster development of reusable components and standards across teams
• Coordinate technical projects across teams within Peloton
• Be a valued member of an autonomous, multi-functional agile team

YOU BRING TO PELOTON

• 5+ years of software engineering experience
• Experience with Python, Kotlin, Javascript/Typescript or similar languages
• Proficiency in at least one JavaScript framework like React (preferred), Vue, or similar
• Experience building, testing, and scaling out RESTful microservices
• Familiarity with accessing, querying and writing to data stores like PostgreSQL, MongoDB, DynamoDB, Elasticsearch, etc.
• Familiar with deployment toolings/environments such as Kubernetes, Terraform, GitHub Actions, Jenkins etc
• Experience with android development ecosystem or Site Reliability Engineering is a plus
• Experience with Claude or similar models and AI development tools is a plus.

Senior Software Engineer, Data Foundations

ABOUT THE ROLE

At Peloton, we treat Data as a Product - a critical asset that powers every member interaction and business decision. The Datastores team’s mission is to provide a reliable, secure, highly available, and highly performant data persistence layer for application services across the company. Our guiding principles: 1. Protect the data, 2. Optimize for scale, speed, and reliability, 3. Eliminate toil.

We are looking for a Senior Software Engineer with deep experience building and operating data-intensive systems to join our Datastores team. This role is ideal for a backend engineer who has built and operated production systems that rely heavily on databases, caching layers, and data pipelines, and who is excited to deepen their expertise in scalable, cloud-native data infrastructure.

You will work at the intersection of application engineering and data platform reliability - partnering with service teams to improve how data is stored, accessed, scaled, and observed across Peloton’s ecosystem.

YOUR DAILY IMPACT AT PELOTON

You will:

• Design, build, and operate backend systems that rely on scalable and highly available data persistence layers.
• Partner with service teams to improve database design, query performance, and data modeling.
• Contribute to automation around infrastructure provisioning using tools like Terraform and Backstage.
  Improve developer experience by building self-service tooling for databases and caching systems.
• Work on observability, performance insights, and autoscaling strategies for production datastores.
• Contribute to architectural decisions around multi-regional data persistence and global scalability.

This role combines hands-on backend engineering with deep exposure to cloud data systems and platform reliability challenges.

WHAT YOU BRING

We’re looking for strong backend engineers who are “data-aligned” — meaning you’ve built systems where data performance, reliability, and modeling mattered.

• 5+ years of software engineering experience building production backend systems.
• Strong experience with relational databases such as PostgreSQL or MySQL, including schema design, indexing, and query optimization.
• Experience working with NoSQL datastores such as DynamoDB, Redis, Elasticsearch, or Memcache.
• Exposure to data pipelines, event-driven architectures, or systems that interface with streaming or batch processing frameworks.
• Experience operating services in cloud environments (preferably AWS).
• A strong understanding of distributed systems fundamentals: latency, consistency models, replication, and scaling strategies.
• Experience running or tuning PostgreSQL or Aurora in production.
• Experience with multi-region architectures.
• Exposure to observability tooling (metrics, tracing, query insights).

WHO YOU ARE

• You think about data integrity first.
• You care about performance and understand that small database decisions can have large system-wide impact.
• You enjoy reducing manual toil through automation.
• You collaborate well with application engineers and platform teams.
• You want to grow deeper into database reliability, scalability, and cloud-native data systems.

Highlights

Location: Remote (CET hours preferred)

Compensation: €5,400 - €6,400 gross + stock options

Language: Russian-speaking team, English B1+ required

About Fundraise Up

We’re Fundraise Up - a global fundraising platform built to make donating to nonprofits fast, seamless, and accessible to all. Every month, our technology powers tens of millions of dollars in donations across the globe. We focus on innovation that directly impacts results: faster load times, higher conversion rates, global payment support, and accessibility-first design.

Our platform is trusted by many of the world’s leading nonprofits, including UNICEF, the Alzheimer’s Association, and a wide range of global NGOs. With a 4.9/5 rating across top software review platforms, we’re recognized not just for our impact - but for the quality of the product we deliver.

A Truly Global Product

We operate in the enterprise segment, serving nonprofit organizations across North America, the United Kingdom, Australia, and Europe.

We’re building a large and complex product ecosystem that serves nonprofits, donors, and partners around the world. The platform includes a modern checkout experience and customizable widgets (each a standalone SPA), donor, organization, and partner portals, admin tools, and several internal apps.

Our backend is powered by Node.js (Koa, NestJS) and MongoDB. The frontend stack includes Webpack, Vue.js, and React, with nearly all code written in TypeScript. For high-throughput messaging and background processing, we use Kafka (for millions of events) and Bull (Redis). Analytics data is stored in ClickHouse, and we use Elasticsearch for search.

The Team

We are a distributed team of 160+ product professionals, including 80+ engineers. Our team members are mainly based across Spain, Poland, Portugal, Georgia, Armenia, Serbia, Turkey, and Cyprus. Many of our developers bring 5 - 10+ years of experience, and we foster a culture of deep technical curiosity and knowledge sharing.

Despite our scale, we operate like a focused team - where every task matters and every voice is heard. We value thoughtful collaboration, strong engineering practices, and a product mindset. You’ll be joining a team where quality, mentorship, and mutual respect come first.

About the Role

As a Senior Data Engineer, you will be responsible for designing, building, and optimizing scalable data pipelines and ETL/ELT processes.

At the initial stage, you will be the first engineer in this direction, taking full ownership of the data domain. As the product and data needs grow, we plan to expand the team, and you will have the opportunity to contribute to its development.

This role requires a high level of autonomy and ownership, combined with close collaboration with analytics, Data Science, and engineering teams.

What You’ll Do

• Design and evolve the architecture of the data platform and storage systems.
• Build reliable ETL/ELT processes and develop scalable data pipelines for delivering data into a centralized analytical warehouse.
• Maintain and further develop the Data Warehouse.
• Collaborate with engineering and analytics teams on system design and architectural decisions.
• Ensure data governance and maintain high standards of data quality.
• Write and optimize queries for MongoDB and ClickHouse.
• Manage and maintain workflows in Airflow.

Requirements

• Experience: 7+ years of experience as a Data Engineer.
• Programming: 5+ years of experience with Python, TypeScript, Node.js, Kafka.
• Strong understanding of data processing algorithms and principles.
• Hands-on experience with ClickHouse, Airflow, Amazon S3, Git, Docker.
• Solid understanding of Data Lake and Data Warehouse architectures.
• Experience working with large-scale data and query optimization.
• Ability to work collaboratively toward shared goals.
• Strong sense of ownership, responsibility, and proactivity.
• English level: B1+.

Nice to Have

• Experience with Apache Parquet, MLflow, MongoDB. 

Why work with us

• A strong, collaborative product team that owns what it builds
• Clear product vision and access to real customer feedback from global nonprofit leaders
• Flat structure: no politics, just great work with great people
• Transparent company culture-we share how we’re growing, where revenue comes from, and what’s next
• Long-term focus: we offer equity options and value sustained, meaningful contribution

Benefits

• 31 days off
• 100% paid telemedicine plan
• Home Office Setup Assistance: the company offers assistance with purchasing furniture (office chair, office desk, monitor) and other items to create a comfortable workspace
• English learning courses
• Relevant professional education
• Gym or swimming pool
• Co-working
• Remote working

 _{**Please note: All official correspondence from Fundraise Up will exclusively originate from the @fundraiseup.com domain. Exercise caution and ensure the authenticity of emails claiming to be from our company.}

About the Role:
Kaseya is looking for an experienced Software Engineer (with Golang) to build the new Backup product.

As a Engineer, you'll take ownership of your code and collaborate with a skilled team of developers, QA engineers, and DevOps professionals. You'll be recognized not only for delivering robust, high-performance services but also for actively driving improvements in product quality and engineering processes.

This is a role for engineers who thrive in fast-moving agile environments, embrace accountability, and are eager to work on systems that require performance, reliability, and scale.

What You’ll Do:

• Take full ownership of backend feature development using Golang, from design through deployment and support
• Collaborate closely with cross-functional teams using Agile/Scrum methodology to refine requirements, estimate effort, and deliver value incrementally
• Design, build, and maintain secure, scalable, and performant microservices and APIs
• Resolve reported defects efficiently while delivering features that delight users
• Drive and uphold best practices in code quality, security, performance, and maintainability
• Contribute to code reviews, documentation, and mentoring within the engineering team

Required Skills & Experience:

• Bachelor’s degree in Computer Science or related technical field (or equivalent practical experience)
• 3+ years of experience in backend development with one or more of the following: C/C++/Java/Ruby/Python/R/Scala
• 1–3 years of professional experience with Golang
• Strong understanding of SQL databases (preferably MySQL), including query optimization and performance tuning
• Deep knowledge of design patterns, data structures, and algorithms in real-world use
• Experience with search technologies such as Elasticsearch, Solr, Lucene, or OpenSearch
• Hands-on experience with Docker, Git, Kubernetes, and virtualization technologies (e.g., OpenStack)
• Demonstrated use of professional software engineering best practices across the full SDLC: coding standards, code reviews, source control, CI/CD, testing, and operations
• Familiarity with Unix/Linux systems
• Preferred Qualifications:
  Experience building cloud-native applications on platforms like AWS
• Exposure to GraphQL, RESTful API design, and service-oriented architecture
• Knowledge of observability tools such as Prometheus, Grafana, ELK, or OpenTelemetry
• Experience with infrastructure-as-code (e.g., Terraform, Helm)
• Background in storage, backup, or disaster recovery systems is a strong plus

Why Join Kaseya:

At Kaseya, you’ll be a part of building a next-generation backup product from the ground up. You'll work alongside passionate professionals who value code quality, system reliability, and thoughtful design. This is a high-impact role where your contributions will be felt immediately—and your technical leadership will help shape the future of our global infrastructure.

What We Offer:

• Hybrid work model — 3 days/week in our Krakow office
• Collaborative and knowledge-sharing team culture
• Competitive salary & benefits

Highlights

Location: Remote (CET hours preferred)

Compensation: €6,800 - €8,000 gross + stock options

Language: Russian-speaking team; English B2+ required

About Fundraise Up

We’re Fundraise Up - a global fundraising platform built to make donating to nonprofits fast, seamless, and accessible to all. Every month, our technology powers tens of millions of dollars in donations across the globe. We focus on innovation that directly impacts results: faster load times, higher conversion rates, global payment support, and accessibility-first design.

Our platform is trusted by many of the world’s leading nonprofits, including UNICEF, the Alzheimer’s Association, and a wide range of global NGOs. With a 4.9/5 rating across top software review platforms, we’re recognized not just for our impact - but for the quality of the product we deliver.

A Truly Global Product

We operate in the enterprise segment, serving nonprofit organizations across North America, the United Kingdom, Australia, and Europe.

We’re building a large and complex product ecosystem that serves nonprofits, donors, and partners around the world. The platform includes a modern checkout experience and customizable widgets (each a standalone SPA), donor, organization, and partner portals, admin tools, and several internal apps.

Our backend is powered by Node.js (Koa, NestJS) and MongoDB. The frontend stack includes Webpack, Vue.js, and React, with nearly all code written in TypeScript. For high-throughput messaging and background processing, we use Kafka (for millions of events) and Bull (Redis). Analytics data is stored in ClickHouse, and we use Elasticsearch for search.

The Team

We are a distributed team of 160+ product professionals, including 80+ engineers. Our team members are mainly based across Spain, Poland, Portugal, Georgia, Armenia, Serbia, Turkey, and Cyprus. Many of our developers bring 5 - 10+ years of experience, and we foster a culture of deep technical curiosity and knowledge sharing.

Despite our scale, we operate like a focused team - where every task matters and every voice is heard. We value thoughtful collaboration, strong engineering practices, and a product mindset. You’ll be joining a team where quality, mentorship, and mutual respect come first.

About the Role

We’re looking for an experienced Team Lead to join the Donor Experience Platform team. In this role, you will lead the development of a technical platform (internal API) that powers the company’s key products — various forms and interfaces for processing online donations.

We already have a strong team of developers as well as a product and technical roadmap in place, but we are missing a strong technical leader to lead the team.

What You'll Do

• Lead a team of 5-8 Fullstack developers.
• Write and review code (approximately 70/30 split in favor of management).
• Ensure the team follows company processes and engineering guidelines.
• Own the delivery of features and adherence to deadlines.
• Make technical decisions, prepare technical designs for new features, and align them with neighboring teams and your manager.
• Manage technical debt and maintain the technical backlog for your team.
• Mentor and develop engineers; conduct regular 1:1 meetings.
• Onboard new team members.
• Conduct performance reviews.

Requirements

• You are an experienced Engineering Team Lead with 10+ years of software development experience, including at least 2 years as a Team Lead or Engineering Manager managing a team of 5–10 developers.
• You’re a hands-on leader who can write code, make sound technical decisions, and design systems thoughtfully.
• You have strong people management skills — hiring, coaching, giving feedback, and resolving conflicts.
• You have at least 5 years of experience as a Fullstack Developer.
• You have at least 5 years of experience in product companies working with our stack: TypeScript, Node.js, MongoDB, Kafka, Redis.
• Experience working in fast-growing companies or startups will be a plus.
• Your English is at B2+ level: you don’t struggle to find words and can confidently discuss any technical topics.

Why work with us

• A strong, collaborative product team that owns what it builds
• Clear product vision and access to real customer feedback from global nonprofit leaders
• Flat structure: no politics, just great work with great people
• Transparent company culture-we share how we’re growing, where revenue comes from, and what’s next
• Long-term focus: we offer equity options and value sustained, meaningful contribution

Benefits

• 31 days off
• 100% paid telemedicine plan
• Home Office Setup Assistance: the company offers assistance with purchasing furniture (office chair, office desk, monitor) and other items to create a comfortable workspace.
• English learning courses
• Relevant professional education
• Gym or swimming pool
• Co-working
• Remote working

_{**Please note: All official correspondence from Fundraise Up will exclusively originate from the @fundraiseup.com domain. Exercise caution and ensure the authenticity of emails claiming to be from our company.}

Highlights

Location: Remote (CET hours preferred)

Compensation: €6,800 - €8,000 gross + stock options

Language: Russian-speaking team; English B2+ required

About Fundraise Up

We’re Fundraise Up - a global fundraising platform built to make donating to nonprofits fast, seamless, and accessible to all. Every month, our technology powers tens of millions of dollars in donations across the globe. We focus on innovation that directly impacts results: faster load times, higher conversion rates, global payment support, and accessibility-first design.

Our platform is trusted by many of the world’s leading nonprofits, including UNICEF, the Alzheimer’s Association, and a wide range of global NGOs. With a 4.9/5 rating across top software review platforms, we’re recognized not just for our impact - but for the quality of the product we deliver.

A Truly Global Product

We operate in the enterprise segment, serving nonprofit organizations across North America, the United Kingdom, Australia, and Europe.

We’re building a large and complex product ecosystem that serves nonprofits, donors, and partners around the world. The platform includes a modern checkout experience and customizable widgets (each a standalone SPA), donor, organization, and partner portals, admin tools, and several internal apps.

Our backend is powered by Node.js (Koa, NestJS) and MongoDB. The frontend stack includes Webpack, Vue.js, and React, with nearly all code written in TypeScript. For high-throughput messaging and background processing, we use Kafka (for millions of events) and Bull (Redis). Analytics data is stored in ClickHouse, and we use Elasticsearch for search.

The Team

We are a distributed team of 160+ product professionals, including 80+ engineers. Our team members are mainly based across Spain, Poland, Portugal, Georgia, Armenia, Serbia, Turkey, and Cyprus. Many of our developers bring 5 - 10+ years of experience, and we foster a culture of deep technical curiosity and knowledge sharing.

Despite our scale, we operate like a focused team - where every task matters and every voice is heard. We value thoughtful collaboration, strong engineering practices, and a product mindset. You’ll be joining a team where quality, mentorship, and mutual respect come first.

About the Role

We are looking for an experienced Team Lead to join our Elements team. In this role, you will lead the development of embedded "elements" — a suite of widgets that non-profits integrate into their websites to drive donations or display impact statistics. Tech Stack: Node.js, React, TypeScript, MongoDB, Cloudflare Workers, and Kafka.

We already have a strong team of developers as well as a product and technical roadmap in place, but we are missing a strong technical leader to lead the team.

What You'll Do

• Lead a team of 3-5 Fullstack developers.
• Write and review code (approximately 70/30 split in favor of management).
• Ensure the team follows company processes and engineering guidelines.
• Own the delivery of features and adherence to deadlines.
• Make technical decisions, prepare technical designs for new features, and align them with neighboring teams and your manager.
• Manage technical debt and maintain the technical backlog for your team.
• Mentor and develop engineers; conduct regular 1:1 meetings.
• Onboard new team members.
• Conduct performance reviews.

Requirements

• You are an experienced Engineering Team Lead with 10+ years of software development experience, including at least 2 years as a Team Lead or Engineering Manager managing a team of 3–5 developers.
• You’re a hands-on leader who can write code, make sound technical decisions, and design systems thoughtfully.
• You have strong people management skills — hiring, coaching, giving feedback, and resolving conflicts.
• You have at least 3 years of experience as a Fullstack Developer.
• You have at least 5 years of experience in product companies working with our stack: TypeScript, Node.js, MongoDB, Kafka, Redis.
• Experience working in fast-growing companies or startups will be a plus.
• Your English is at B2+ level: you don’t struggle to find words and can confidently discuss any technical topics.

Why work with us

• A strong, collaborative product team that owns what it builds
• Clear product vision and access to real customer feedback from global nonprofit leaders
• Flat structure: no politics, just great work with great people
• Transparent company culture-we share how we’re growing, where revenue comes from, and what’s next
• Long-term focus: we offer equity options and value sustained, meaningful contribution

Benefits

• 31 days off
• 100% paid telemedicine plan
• Home Office Setup Assistance: the company offers assistance with purchasing furniture (office chair, office desk, monitor) and other items to create a comfortable workspace.
• English learning courses
• Relevant professional education
• Gym or swimming pool
• Co-working
• Remote working

_{**Please note: All official correspondence from Fundraise Up will exclusively originate from the @fundraiseup.com domain. Exercise caution and ensure the authenticity of emails claiming to be from our company.}

• Design and implement highly scalable backend endpoints
• Gather product requirements and write design docs to satisfy product needs
• Drive/Lead full lifecycle of software development: product requirements, architecture, solution design, development, quality assurance, and maintenance
• Mentor others on best practices and effectively share knowledge
• Ability to effectively communicate development progress to the product lead, engineering manager, and other stakeholders
• Be comfortable introducing new technologies and new ideas as required
• Work effectively as part of a large global team
• Attend and engage in scrum ceremony meetings, team parties, and manager 1:1s
• Provide feedback to co-workers in written and verbal form and respond to technical and behavioral feedback from managers and peers

• Proactively acts without being told what to do. Able to identify areas of improvement and driving best practices to deliver high quality, performant, and scalable solutions
• Develops services that are highly available and scalable with proper monitoring and alerting in place
• Able to up-level the team by sharing knowledge and best practices with the engineering team
• Able to deal with ambiguity
• Ownership of projects from start to finish. Just because the project has been deployed doesn’t mean it’s done
• Organized and able to effectively plan and breakdown large projects into smaller tasks that are easier to estimate and deliver
• Lets others speak and seek to understand their viewpoints
• A creative and innovative problem solver & previous experience working in an agile, startup environment
• Confident in owning your role, and bringing creative ideas to the hands of our users

• Minimum 5 years of industry experience in backend development, at least 1-2 years in senior positions, developing large-scale applications
• Experience developing distributed web applications
• Your code is comprehensible, well-structured, highly performant
• Experience with database modeling (SQL or NoSQL both OK)
• Experience with using and designing RESTful services
• Strong knowledge of computer science fundamentals, including data structures, algorithms, and object-oriented design
• Proven experience leveraging AI tools to enhance software development processes, including code generation, debugging, and productivity optimization. Candidates should demonstrate fluency in integrating AI-driven solutions into their workflows and a willingness to stay current with emerging AI technologies

Highlights:

Location: Remote (CET hours preferred)

Compensation: €4,400 - €5,500 Gross + stock options

Language: Russian-speaking team

About Fundraise Up

We’re Fundraise Up - a global fundraising platform built to make donating to nonprofits fast, seamless, and accessible to all. Every month, our technology powers tens of millions of dollars in donations across the globe. We focus on innovation that directly impacts results: faster load times, higher conversion rates, global payment support, and accessibility-first design.

Our platform is trusted by many of the world’s leading nonprofits, including UNICEF, the Alzheimer’s Association, and a wide range of global NGOs. With a 4.9/5 rating across top software review platforms, we’re recognized not just for our impact - but for the quality of the product we deliver.

A Truly Global Product

We operate in the enterprise segment, serving nonprofit organizations across North America, the United Kingdom, Australia, and Europe.

We’re building a large and complex product ecosystem that serves nonprofits, donors, and partners around the world. The platform includes a modern checkout experience and customizable widgets (each a standalone SPA), donor, organization, and partner portals, admin tools, and several internal apps.

Our backend is powered by Node.js (Koa, NestJS) and MongoDB. The frontend stack includes Webpack, Vue.js, and React, with nearly all code written in TypeScript. For high-throughput messaging and background processing, we use Kafka (for millions of events) and Bull (Redis). Analytics data is stored in ClickHouse, and we use Elasticsearch for search.

The Team

We are a distributed team of 160+ product professionals, including 80+ engineers. Our team members are mainly based across Spain, Poland, Portugal, Georgia, Armenia, Serbia, Turkey, and Cyprus. Many of our developers bring 5 - 10+ years of experience, and we foster a culture of deep technical curiosity and knowledge sharing.

Despite our scale, we operate like a focused team - where every task matters and every voice is heard. We value thoughtful collaboration, strong engineering practices, and a product mindset. You’ll be joining a team where quality, mentorship, and mutual respect come first.

About the Role

As a Senior QA Engineer (Quality Enablement), you will work in a cross-team role focused on improving product quality through processes, practices, and engineering influence across the entire organization.

QAE does not write product tests for teams on a regular basis. Instead, the role focuses on:

• Helping teams build effective testing strategies
• Reviewing test scenarios, automated tests, and technical decisions
• Analyzing quality metrics and driving improvements
• Educating teams on testing and automation best practices
• Preventing production incidents and reducing technical debt
• Contributing to test frameworks (helpers, utilities)

What You'll Do

• Help product teams define and improve testing strategies (unit / integration / E2E)
• Review test scenarios, automated tests, and quality-related technical decisions
• Analyze defects, flaky tests, and testing results
• Drive improvements based on quality metrics and recurring issues
• Support teams in building reliable and scalable test automation
• Contribute to test frameworks and shared tooling (helpers, utilities)
• Collaborate with engineers, product teams, and QA engineers
• Educate and mentor teams on testing practices and automation approaches
• Ensure test automation does not negatively impact CI performance

Requirements

• 7+ years of experience in testing web client-server applications
• 3+ years of experience in test automation
• Hands-on experience writing automated tests (E2E / integration)
• Experience with JavaScript / TypeScript
• Understanding of frontend architecture (React)
• Understanding of backend architecture (Node.js / NestJS)
• Experience developing or maintaining test frameworks
• Strong understanding of testing levels (unit / integration / E2E)
• Experience writing test scenarios or defining test strategy
• Experience reviewing automated tests (code review)
• Experience with CI/CD (Jenkins or similar)
• Docker (images, networks, volumes, docker-compose)
• Ability to influence quality through processes, not only code
• Strong communication skills
• Ownership mindset and willingness to take responsibility for quality decisions

Nice to Have

• Experience introducing testing or automation processes in teams
• Experience working with quality metrics (flaky rate, coverage, CI performance)
• Experience analyzing defects and improving processes
• Experience conducting trainings, workshops, or mentoring
• Experience working across multiple product teams
• Experience building or evolving E2E frameworks
• Experience reducing flaky tests and optimizing CI
• Experience in platform or enablement teams

Why work with us

• A strong, collaborative product team that owns what it builds
• Clear product vision and access to real customer feedback from global nonprofit leaders
• Flat structure: no politics, just great work with great people
• Transparent company culture-we share how we’re growing, where revenue comes from, and what’s next
• Long-term focus: we offer equity options and value sustained, meaningful contribution

Benefits

• 31 days off
• 100% paid telemedicine plan
• Home Office Setup Assistance: the company offers assistance with purchasing furniture (office chair, office desk, monitor) and other items to create a comfortable workspace.
• English learning courses
• Relevant professional education
• Gym or swimming pool
• Co-working
• Remote working.

_{**Please note: All official correspondence from Fundraise Up will exclusively originate from the @fundraiseup.com domain. Exercise caution and ensure the authenticity of emails claiming to be from our company.}

Highlights

Location: Remote (CET hours preferred)

Compensation: €5,100 - €6,300 gross + stock options

Language: Russian-speaking team

About Fundraise Up

We’re Fundraise Up - a global fundraising platform built to make donating to nonprofits fast, seamless, and accessible to all. Every month, our technology powers tens of millions of dollars in donations across the globe. We focus on innovation that directly impacts results: faster load times, higher conversion rates, global payment support, and accessibility-first design.

Our platform is trusted by many of the world’s leading nonprofits, including UNICEF, the Alzheimer’s Association, and a wide range of global NGOs. With a 4.9/5 rating across top software review platforms, we’re recognized not just for our impact - but for the quality of the product we deliver.

A Truly Global Product

We operate in the enterprise segment, serving nonprofit organizations across North America, the United Kingdom, Australia, and Europe.

We’re building a large and complex product ecosystem that serves nonprofits, donors, and partners around the world. The platform includes a modern checkout experience and customizable widgets (each a standalone SPA), donor, organization, and partner portals, admin tools, and several internal apps.

Our backend is powered by Node.js (Koa, NestJS) and MongoDB. The frontend stack includes Webpack, Vue.js, and React, with nearly all code written in TypeScript. For high-throughput messaging and background processing, we use Kafka (for millions of events) and Bull (Redis). Analytics data is stored in ClickHouse, and we use Elasticsearch for search.

The Team

We are a distributed team of 160+ product professionals, including 80+ engineers. Our team members are mainly based across Spain, Poland, Portugal, Georgia, Armenia, Serbia, Turkey, and Cyprus. Many of our developers bring 5 - 10+ years of experience, and we foster a culture of deep technical curiosity and knowledge sharing.

Despite our scale, we operate like a focused team - where every task matters and every voice is heard. We value thoughtful collaboration, strong engineering practices, and a product mindset. You’ll be joining a team where quality, mentorship, and mutual respect come first.

About the Role

As a Backend Developer, you will be a key architect of the engine that powers our global platform. You'll resolve complex challenges in a high-load, distributed system, building and scaling the infrastructure that processes millions in donations. This is not a maintenance role; it's a high-impact, product-focused engineering position where clean architecture, performance, and reliability are paramount.

You will work on a complex product ecosystem—from our modern checkout experience to donor portals and massive analytics pipelines—all powered by a cutting-edge tech stack.

• Backend: Node.js (Koa, NestJS), TypeScript
• Database: MongoDB
• Infrastructure: Kafka for event streaming, Bull (Redis) for background jobs, ClickHouse for analytics, and Elasticsearch for search.

What You'll Do

• Design, build, and maintain clean, efficient, and scalable backend services in Node.js and TypeScript.
• Develop new product features from concept to deployment, collaborating closely with product managers and frontend engineers.
• Own key parts of our backend architecture, making critical decisions that enhance performance, reliability, and security.
• Write comprehensive unit tests and conduct thorough code reviews to maintain code quality.
• Proactively identify and implement system improvements, refactoring legacy code where necessary.
• Contribute to a culture of engineering excellence by mentoring others and sharing your expertise.

Requirements

• Experience: 5+ years of backend development experience, preferably in a product-driven environment.
• Node.js Expertise: Strong, hands-on experience with Node.js and modern frameworks like Koa or NestJS.
• TypeScript Pro: Deep expertise in TypeScript, including its advanced typing and module systems.
• Database Skills: Solid experience with MongoDB or other NoSQL databases.
• Distributed Systems: Familiarity with event-driven architecture using tools like Kafka, RabbitMQ, or Bull/Redis.
• Data & Search: Hands-on experience with ClickHouse (or similar analytics DBs) and Elasticsearch.
• Architectural Mindset: A strong understanding of system design, clean architecture principles, and performance optimization.
• Ownership: The ability to work independently, take ownership of your work, and see projects through to completion.
• Communication: Comfortable working within a Russian-speaking team.

Nice to Have

• Prior experience working in a remote-first, globally distributed team.
• Experience with performance monitoring and observability tools (e.g., Prometheus, Grafana, Datadog).
• A genuine interest in the non-profit technology sector.
• A hypothesis-driven mindset and the ability to communicate complex technical concepts to non-technical stakeholders.

Bonus points

• Curiosity and a hypothesis-driven mindset
• Ability to communicate complex analytical concepts to non-technical audiences
• Detail-oriented with a strong sense of ownership
• Comfort working in fast-paced, data-rich environments

Why work with us

• A strong, collaborative product team that owns what it builds
• Clear product vision and access to real customer feedback from global nonprofit leaders
• Flat structure: no politics, just great work with great people
• Transparent company culture-we share how we’re growing, where revenue comes from, and what’s next
• Long-term focus: we offer equity options and value sustained, meaningful contribution

Benefits

• 31 days off
• 100% paid telemedicine plan
• Home Office Setup Assistance: the company offers assistance with purchasing furniture (office chair, office desk, monitor) and other items to create a comfortable workspace
• English learning courses
• Relevant professional education
• Gym or swimming pool
• Co-working
• Remote working

_{**Please note: All official correspondence from Fundraise Up will exclusively originate from the @fundraiseup.com domain. Exercise caution and ensure the authenticity of emails claiming to be from our company.}

Location: Poland (Remote/Flexible)

We Are: 

RTB House is a global company that provides state-of-the-art marketing technologies for top brands and agencies worldwide. Its proprietary ad-buying engine is the first in the world to be powered entirely by Deep Learning algorithms, enabling advertisers to generate outstanding results and reach their goals at every stage of the funnel. 

We are looking for Senior Engineers to support our Bidding Platform organization which is the core of the RTB business, processing over 20 million requests per second to participate in real-time auctions and display advertisements to customers from 90+ countries. If you want to work on technically complex and demanding solutions, this is the opportunity for you!

Our Senior Engineers are experts who combine deep technical expertise with a strong sense of ownership, and they take on Tech Lead roles in complex, cross-team projects.

You will:

• Design and lead implementation of system changes that deliver high performance, scalability and observability for displaying and tracking ads world wide. Develop tools and optimizations to drive measurable improvements in critical user performance metrics.
• Implement, test, deploy, monitor and maintain (in all aspects, including setting up environment, writing configuration code, monitor production) HTTP / gRPC services and batch jobs in Java and Python, ensuring adherence to the high engineering standards.
• Provide hands-on technical leadership: solving complex system challenges, participating in planning and scoping of projects, and ensuring the implementation of the highest coding standards through participation in code reviews.

Requirements:

• Excellent understanding of how complex IT systems work - from the hardware level, through software, to algorithms.
• Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others).
• Good knowledge of basic methods of creating concurrent programs and distributed systems (from thread level to geo-distributed clusters level).
• Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it).
• The ability to critically analyze the solutions created in terms of performance (from estimating the theoretical performance of the designed systems to detecting and removing actual performance problems in production).
• General knowledge of issues (typical problems and methods of solving them) in the areas of 'high scalability' and 'high availability'.
• C1 level in English and Polish.

Nice to have:

• Experience in the AdTech/Real Time Bidding space.
• Experience contributing to Real User Monitoring (RUM) systems.

Selected technologies used: 

• Java, Python
• Aerospike, Memcached
• Google Cloud Platform, BigQuery, MinIO
• Kafka, Clickhouse
• PostgreSQL
• Elasticsearch
• Kubernetes, Prometheus
• Jenkins, Graphite

We Offer:

• Projects focused on extreme performance and high code quality – clean code and solid code reviews are our standard.
• Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers).
• Access to modern technologies and the opportunity to apply them in large-scale, high-impact projects.
• Cooperation based on B2B contract.
• You can cooperate 100 % remotely or choose one of our office spaces in Warsaw or Cracow.

Apply now

You don't need to tick every box to apply. If you are passionate about software engineering, send us your CV, and we'll review it.

Location: Poland

We Are: 

RTB House is a global company that provides state-of-the-art marketing technologies for top brands and agencies worldwide. Its proprietary ad-buying engine is the first in the world to be powered entirely by Deep Learning algorithms, enabling advertisers to generate outstanding results and reach their goals at every stage of the funnel. 

Our Platform Engineering team, within the Bidding Platform structure, is looking for engineers with a strong interest in system-related topics (deployment, monitoring, databases, load balancing), as well as experience in leading the specification and development of complex projects and coordinating the work of others.
If you want to work on technically challenging and sophisticated solutions, this is the opportunity for you!

You Will: 

• Plan and then hands-on lead further development within a given technical area like deployment, monitoring, databases or load balancing, in the context of existing infrastructure within RTB House;
• Coordinate the work of a project team of 3-4 people, also making arrangements with other teams and units within RTB House;
• Ensure the reliability and scalability of the solutions built.

Desired Experience: 

• Excellent understanding of how complex IT systems work - from the hardware level, through software, to algorithms;
• Ability to proactively define requirements, ask appropriate questions and draw conclusions that will combine technical constraints and business needs;
• Ability to lead the design and implementation of a solution;
• Experience in leading project teams;
• Willingness to be involved in topics that go beyond programming and design, such as responsibility for technical areas or communication with other teams;
• Proactive attitude, independence in taking action;
• Extensive experience in programming and readiness to implement key system elements as well as involvement in code reviews;
• Good knowledge of methods of creating concurrent programs and distributed systems;
• Ability to critically analyze created solutions in terms of performance (from estimating the theoretical performance of designed systems to detecting and removing actual performance problems in production);
• C1 level in English and Polish.

Selected technologies used:

• Java, Python
• Kubernetes, Prometheus
• Aerospike, Memcached
• Google Cloud Platform, BigQuery, MinIO
• Kafka, Clickhouse
• PostgreSQL
• Elasticsearch
• Jenkins, Graphite

We Offer:

• Projects focused on extreme performance and high code quality – clean code and solid code reviews are our standard.
• Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers).
• Access to modern technologies and the opportunity to apply them in large-scale, high-impact projects.
• Cooperation based on B2B contract.
• You can cooperate 100 % remotely or choose one of our office spaces in Warsaw or Cracow.

Apply now!

You don't need to tick every box to apply. If you are passionate about software engineering, send us your CV, and we'll review it.

Location: Poland

We Are: 

RTB House is a global company that provides state-of-the-art marketing technologies for top brands and agencies worldwide. Its proprietary ad-buying engine is the first in the world to be powered entirely by Deep Learning algorithms, enabling advertisers to generate outstanding results and reach their goals at every stage of the funnel. 

The Bidding Platform Team is crucial in driving our company’s success. We work collaboratively to deliver system modules and components that support over 24 million queries per second, all while maintaining a low latency of 50 ms.

You Will: 

• Design and programming of a wide range of modules and components as part of a system that supports over 24M queries per second and low latency.
• Work on the optimization of the developed software in terms of response time and resource consumption
• Ensure the reliability and scalability of the solutions built
• Create performance and correctness tests for new system components
• Analyse new technologies in terms of their applicability in production conditions
• Develop tools for monitoring and analysing the operation of the production system
• Continuous optimization of existing tools and processes

Desired Experience: 

• Proficiency in programming
• Excellent understanding of how complex IT systems work (from the hardware level, through software, to algorithmics)
• Very good knowledge of fundamental Internet protocols and technologies (DNS, HTTP, cookies and others)
• Good knowledge of basic methods of creating concurrent programs and distributed systems (from thread level to continent level)
• Practical ability to observe, monitor and analyse the operation of production systems (and draw valuable conclusions from it)
• The ability to critically analyze the solutions created in terms of performance (from estimating the theoretical performance of the designed systems to detecting and removing actual performance problems in production)
• General knowledge of issues (typical problems and methods of solving them) in the areas of 'high scalability' and 'high availability'
• C1 level in English and Polish

Selected Technologies:

• Java, Python
• Aerospike, Memcached
• Google Cloud Platform, BigQuery, MinIO
• Kafka, Clickhouse
• PostgreSQL
• Elasticsearch
• Kubernetes, Prometheus
• Jenkins, Graphite

We Offer: 

• Projects focused on extreme performance and high code quality – clean code and solid code reviews are our standard.
• Collaboration within an interdisciplinary, self-sufficient team (including DevOps, database experts, backend developers, product designers, and QA engineers).
• Access to modern technologies and the opportunity to apply them in large-scale, high-impact projects.
• Cooperation based on B2B contract.
• You can cooperate 100 % remotely or choose one of our office spaces in Warsaw or Cracow.

Apply now! 

You don't need to tick every box to apply. If you are passionate about software engineering, send us your CV, and we'll review it.

Work with HelloFresh in Warsaw and its HelloTech organisation, HelloFresh’s global technology backbone with more than 1000 people, building the digital products that power our end-to-end food experience. From meal kits and ready-to-eat meals to specialty offerings like pet food and premium meat & seafood, HelloTech creates the platforms that bring tailored food solutions to millions of customers every month.

Our subscription-based, direct-to-consumer model relies on technology at every step, from customer-facing apps and personalization logic to pricing, forecasting, supply chain optimization, and initiatives that help reduce food waste. While our brands operate independently to serve distinct customer needs, they are united by shared platforms, data, and operational excellence built by HelloTech.

HelloTech works in autonomous, cross-functional alliances, each owning a specific product or domain end to end. By working with our Warsaw office, you will help shape scalable, data-driven products used across our markets, working with a modern tech stack and international teams to continuously improve how people discover, order, and enjoy HelloFresh’s products, today and in the future.

About the role: What's in the Box

The position is part of the Active Journey Alliance, which has the mission to maximize retention of active customers. Active Journey Alliance helps customers to create habits with our products, manage their subscription, order the products they love and provide help in the face of errors. 

Backend Engineers assume development and operational responsibility for the HelloFresh platform that serves millions globally to deliver the best experience for our customers and internal users. 

At HelloTech, flexibility and cross-functional collaboration are core to how we work. While this role is aligned to a specific Alliance, strong candidates may also be considered for opportunities across different teams or projects.

What you’ll do: The Recipe

• Work on of the architecture, design, development, deployment and operations of the microservices you will develop, using DevOps practices, pair programming and other cutting edge methodologies 

• Be active, solution-oriented member of autonomous, cross-functional agile teams collaborating with Product Owners, Front-end Engineers, Designers, and Business Intelligence teams 

• Having an in-depth understanding of HelloFresh’s core product and architecture, and act as ambassador for software solutions offering support and mentorship to colleagues 

• Work with state-of-the-art technologies like Golang, Kafka, Docker, Kubernetes and more

What you’ll bring: The Ingredients 

• Solid hands-on experience working with AI coding agents (e.g., Claude Code, Cursor, Copilot) beyond casual experimentation. You use AI agents as thought partners to onboard on unfamiliar codebases and navigate new areas of the code with confidence. You have a practical sense of how the context you provide to AI tools - specifications, constraints, examples - shapes output quality, and a developing awareness of how agentic outputs can fail, with growing habits around verifying, testing, and setting boundaries on AI-generated work.

• Strong background in backend development, with a focus on microservices and distributed systems

• Proven ability to build event-driven architectures using messaging technologies such as RabbitMQ, Kafka, or AWS SQS/SNS

• Proficiency in Go and/or PHP is preferred; experience with JVM languages and a willingness to learn Golang is also welcome

• Practical knowledge of Docker, container orchestration tools like Kubernetes, and CI/CD implementation

• Solid foundation in testing practices, including both unit and end-to-end testing

• Deep understanding of relational databases

• Familiarity with MongoDB, Elasticsearch, and/or GraphQL is a plus

Above all, we are looking for individuals who will make HelloFresh better. We believe there are many different ways of developing skills and we love diverse experiences! So even if you don’t “tick all the boxes” but think you’d thrive in this role, we would really like to learn more about you.

What we offer: The Toppings

• Global collaboration at scale: Collaborate with experienced engineers and product partners across HelloTech’s international teams, in a culture of active knowledge sharing.
• Technology with real-world impact: Build and operate modern systems at global scale, supporting 6+ millions of customers and complex supply chain operations.
• Technical/Product/Design leadership: Drive best practices and influence architecture/design, quality, and ways of working in an autonomous, product-led setup.
• End-to-end development/delivery: Drive decisions from problem definition to production, improving systems and enabling long-term scalability.
• Access to workspace at Warsaw Centre Point. The hub offers modern facilities including showers, breakout zones, outdoor space, cycle parking, and refreshments (coffee, soft drinks, and fruit).

Are you the missing ingredient? If this sounds like a tasty opportunity, we’d be excited to hear from you.  We aim to review your profile and respond within 5 business days.

#Engineering

Fairmarkit is looking for a skilled Python Backend  Software Engineer to join Fairmarkit and strengthen our growing engineering team. Experience in leading result oriented teams would be a benefit.

Technologies used on the team:

• Python 3.9, 3.11
• Django, DRF, FastAPI
• DDD, CQRS
• PostgreSQL, Redis, RabbitMQ, Elasticsearch, Kafka
• AWS: EKS, Security Groups, ALBs, RDS, ElastiCache, ElasticSearch, EC2, S3, SES, SQS
• Docker & Docker-compose
• Kubernetes, Vault
• Nginx
• Celery
• Jira, GitLab, Sentry, Grafana, Loki, Mimir, Tempo

Responsibilities

• Full cycle of designing & implementing cloud based solution;
• Coordinating & participating in solution implementation, performance, stability, etc.;
• Participate in the Engineering strategy definition and execution;
• Growing technical culture & skills in the team;
• Determine and identify solution specifications and/or needs;
• Analyze the needs of large solutions and breaking them down into smaller manageable components;
• Communicate technical solution requirements to developers. Explain system structure to them and provide assistance throughout the assembly process; 
• Choose suitable software, hardware and suggest integration methods;
• Help resolve complex technical problems as and when they arise;
• Ensure that systems satisfy quality standards and procedures. Carry out testing procedures to ensure systems are running smoothly;
• Create and maintain technical documentation

Requirements

• Proven ability to practically apply architecture standards and patterns to accelerate and enable the delivery of technology solutions to business needs. Proficiency in DDD and CQRS;
• Strong Python skills;
• At least 4 years of technical leadership experience with defining, designing, developing, and implementing complex integration business solution;
• Demonstrated knowledge in the use of microservices in reducing development complexity;
• Strong analytical and problem-solving skills;
• Deep understanding of fundamental concepts of SQL and NoSQL databases;
• Practical experience with messaging services (Kafka, RabbitMQ, etc.), understanding how to choose & use them properly;
• Understanding networking and security concepts of at least one major cloud;
• Strong knowledge and hands on experience with Kubernetes;
• Excellent communication skills, ability to present ideas, and concepts in a clear and concise manner. Excellent English skills.
• Practical experience in designing or implementing integration solutions;

Nice to have:

• Practical experience in designing or implementing data processing solutions;
• Familiarity with data processing frameworks (Spark, Flink, Storm, etc.);

Advantages of working with us:

• Flexible working hours
• Highest level of development and pure DevOps culture - top technology stack
• Skilled and highly motivated teammates, passionate about technologies
• Fast decision making process in a company and effective interaction between teams and departments
• Possibility to improve the development process and bring your ideas, knowledge sharing between colleagues and teams
• Latest MacOs work equipment (macbook)
• 100% salary sick leaves covering, 20 days of paid vacation
• Referral program: we appreciate your recommendations and reward every successful hire
• Professional trainings & courses, attendance of conferences & meetups are paid by Fairmarkit

#Poland #Europe #Serbia

About Shelf

The enterprise is going agentic — but most AI agents fail when they hit real business complexity. Shelf is changing that.

We’ve built the operating system for agentic AI: a platform that models your policies, workflows, and operational logic into an AI Data Model so agents don’t just respond — they reason. The result? AI that understands how your business actually runs and delivers precise, compliant, auditable outcomes at scale.

Brands like Amazon, Nespresso, HelloFresh, and KeyBank trust Shelf to power AI agents that resolve 85% of cases autonomously, cut handle times by 20–25%, and turn hours-long processes into seconds. We’re partnered with Microsoft, Salesforce, OpenAI, Snowflake, and Databricks — and recognized by Gartner (Cool Vendor) and IDC (Innovator) for our approach.

If you want to sell the infrastructure that makes agentic AI actually work in the enterprise, you’re in the right place.

Our mission is to empower humanity with better answers everywhere.

Senior Frontend React Developer:

As a Frontend Engineer at Shelf, you'll craft the interfaces that make enterprise AI accessible and trustworthy. While others are building chatbots, we're solving the harder problem: how do you build UIs that help users confidently navigate AI-powered systems processing millions of documents, while maintaining enterprise-grade reliability?

You won't just build React components — you'll architect production-ready Next.js applications that handle high-load scenarios with complex states, real-time AI streaming, and multiple layers of enterprise functionality. Every interface decision you make directly impacts how knowledge workers at the biggest companies in the market interact with their most critical information.

This is frontend engineering at its most demanding. You'll tackle challenges like building real-time streaming interfaces for LLM responses, architecting state management for concurrent AI operations across multiple tenants, creating accessible interfaces for complex knowledge graphs with thousands of nodes, and ensuring blazing fast interactions even with petabytes of searchable content. Your components will bridge everything from enterprise authentication systems to cutting-edge AI models, requiring both sophisticated technical skills and sharp product instincts.

We obsess over frontend quality because we're building the trust layer for AI itself. When your interfaces gracefully handle edge cases, provide clear feedback during AI processing, and remain performant under load, you're not just meeting UX standards - you're directly enabling users to trust AI-powered answers and make critical business decisions with confidence.

You'll work on production SSR applications serving thousands of enterprise users, implementing localization for global markets, ensuring accessibility compliance, and maintaining security standards that pass SOC 2 audits. Your code will integrate with our Elasticsearch clusters, DynamoDB tables, and Aurora PostgreSQL databases through the largest park of REST APIs, handling real-time websocket updates for AI streaming and collaborative features.

We're a product company that ships fast without compromising on lasting quality. You'll work alongside proactive, ever-learning engineers who actively use AI coding assistants (OpenAI Codex, Claude Code) to accelerate development. We build custom MCP servers, implement DSPy pipelines for LLM optimization, and experiment with different AI tools for implementation. In our environment, AI isn't just what we build — it's how we build.

The best engineers we know are drawn to problems that matter. If you're excited by the challenge of building interfaces that make the AI revolution actually usable and trustworthy for enterprise users, this role offers the rare combination of technical depth, meaningful impact, and the prestige of solving UX patterns that the industry hasn't figured out yet.

Responsibilities

• Design and implement production-ready Next.js SSR applications with complex state management, handling high-load scenarios and real-time AI interactions at scale
• Build interfaces for AI-powered features including streaming LLM responses, semantic search across millions of documents, interactive knowledge graphs, intelligent content recommendations, and AI agentic builders
• Architect component libraries and maintain our design system in Storybook, ensuring reusability, accessibility, and consistent UX patterns across the platform
• Develop enterprise-grade functionality including multi-language support, accessibility compliance, cross-browser compatibility, and security implementations that meet SOC 2 standards
• Create comprehensive technical specifications and component API designs that clearly communicate interface decisions, performance trade-offs, and accessibility considerations
• Build and optimize data-heavy UIs using React Flow for node-based graphs, Highcharts for analytics visualizations, and custom virtualization for handling large datasets
• Instrument components for performance monitoring, track Core Web Vitals, implement error boundaries, and build automated visual regression tests with Playwright
• Take full ownership of the features you build, monitoring their performance in production, optimizing bundle sizes, and ensuring they scale gracefully as user load grows
• Work with SWR for intelligent data fetching, caching, and revalidation strategies that minimize API calls while keeping UIs responsive and data fresh
• Integrate with backend services via REST APIs, handle websocket connections for real-time updates, and implement optimistic UI patterns for seamless user experiences
• Leverage AI coding assistants to accelerate development while maintaining high code quality, and contribute to building internal AI agents that automate frontend workflows
• Stay current with React ecosystem best practices, Next.js updates, AI UX patterns, and modern frontend architecture—experiment with new approaches and share findings with the team
• Contribute to our engineering standards and practices through thoughtful code reviews, mentor colleagues on frontend best practices, and actively participate in our culture of continuous learning

Requirements

• Over 5 years of professional frontend engineering experience, including more than 3 years specializing in React and modern JavaScript/TypeScript
• Production Next.js experience - you've built and shipped SSR applications at scale, understand app router patterns, server components, and the trade-offs between SSR, SSG, and CSR
• Deep TypeScript expertise - you write type-safe code with generics, utility types, and advanced patterns. 
• Complex state management - hands-on experience architecting state solutions for challenging scenarios: real-time collaboration, optimistic updates, multi-tenant data isolation, and large-scale data synchronization
• Enterprise application development - you've built applications with localization (i18n), accessibility, security best practices, and compliance requirements. You understand the complexity beyond "making it work"
• AI/LLM interface experience - you've built interfaces for AI-powered features: streaming token responses, chat UIs, semantic search, or similar real-time AI interactions
• High-load optimization - proven track record optimizing applications for performance under heavy traffic, large datasets, and concurrent operations. You monitor Core Web Vitals and know how to improve them
• Modern CSS mastery - strong expertise with Tailwind CSS and/or CSS-in-JS solutions. You can implement pixel-perfect designs while maintaining responsive layouts and dark mode support
• Write well-structured, testable code with thoughtful component abstractions and clean APIs. You know when to abstract and when to keep it simple
• Strong problem-solving skills and genuine curiosity - you don't wait for designs to be perfect but proactively identify UX issues and propose solutions. You're never satisfied with "good enough" and constantly refine your craft
• Experience with AI coding assistants (OpenAI Codex, Claude, etc.) and eagerness to push the boundaries of AI-assisted development. Part of this role involves creating AI agents to automate portions of the frontend workflow
• Familiarity with observability and monitoring tools like Datadog, Sentry, or similar platforms for tracking frontend performance and errors in production
• Upper-Intermediate or better English skills for technical communication, documentation, and collaborating with distributed teams
• Present your work effectively both verbally and visually - you can articulate design decisions, create component documentation, and explain technical trade-offs clearly

Be a Plus:

• Experience with React Flow, Highcharts, or other complex data visualization libraries
• Understanding of Node.js/Python/backend fundamentals - you can read backend code and contribute to API design discussions
• Experience with SWR, React Query, or similar data fetching libraries
• Hands-on experience with vector search UIs, RAG interfaces, or semantic search implementations
• Familiarity with MCP (Model Context Protocol), DSPy, or other cutting-edge AI frameworks
• Experience with monorepo tools (Lerna, Turborepo, Nx) and managing shared component libraries
• AWS services knowledge (S3, CloudFront, Lambda) and understanding of serverless architectures
• Built or contributed to design systems or open-source component libraries
• Experience with Playwright, Puppeteer, or Cypress for comprehensive E2E testing
• Experience building AI agent interfaces or agentic AI workflows

What Shelf Offers:

• B2B contract
• Company Stock Options
• Hardware: MacBook Pro
• Modern technical stack. Develop open-source software
• Premier AI development environment: GitHub Copilot, Claude Code, OpenAI Codex, TypingMind, v0, MCP Servers, plus credits for experimenting with emerging AI tools

Why Shelf

• Our Leadership Team has deep knowledge management and AI domain expertise and enterprise SaaS background to execute this plan
• We love our customers and our customers love us. Ask a Shelf customer why, and they’ll tell you it’s because of our innovative capabilities, rock-solid reliability, they truly enjoy working with our people, but most of all – it’s the improvements they see in their business KPIs.
• We have raised over $60 million in funding and our investors include Tiger Global, Insight Partners, Connecticut Innovations, and others
• We have high velocity growth powered by the most innovative product in our category, 3X growth for 3 years in a row
• We now have over 100 employees in multiple U.S. states and European countries, and we have ambitious hiring goals over the next few months

Our Values:

Quality - We’re united by our focus on world‑class Quality. Quality in all things – starting with everything that leaves your desk. Everything you touch – every email, report, campaign, and piece of code – should be outstanding. Your work product should blow people away. Having people look at what you’ve done and say, “Wow.” That’s the standard here. Remember that how you do anything is how you do everything. Focus on craftsmanship—your ability to make things better.

Momentum - for us means that you should know that the things you’re responsible for are moving forward. When you look around and see something that’s stalled, get it moving again. We pride ourselves on “ball movement.” When your boss or team leaves you with something, they should return to see measurable progress. Small, continuous movement is our recipe for success. Constantly look for how to make the work around you move forward. We want you to initiate solutions, ideas, and progress. Don’t wait for it to come to you—reach out and create movement. All the time.

Accountability - We expect every team member to feel that they are accountable for more than anyone might normally expect. Each of us should feel real responsibility for things even at the edge of our control. We consistently share and align on expectations, give each other open and respectful feedback, and use those two drivers to ensure that every agreement we make with one another is clear and complete.

Hard Work - We’re here to do something difficult together. We care intensely about the mission and we expect that from our teammates. That care means that we work hard here. Hard work comes with long hours, extra effort…and real opportunity at Shelf. Your passion for creating and sustaining output is a part of our DNA. Support each other, cheer each other on, drive the mission forward. Great teams sustain intense effort together to win.

Learning Agility - We’re innovating in one of the fastest‑moving spaces in history at a time of accelerating global change. That’s incredibly exciting and requires each of us to commit fully to learning each and every day so that we can be the best at what we do. None of us know everything. All of us can learn anything. Staying open and constantly curious is a key success driver at Shelf. It also requires humility. We prize people who are consistently humble and open to making mistakes and growing from them. Recognize also that learning itself is a skill…we need you to be really good at it. Keep dialing in your own understanding about how you learn best and push yourself to keep growing.

Adapt and Thrive - Overcoming challenges lives deep in our DNA. We have a proud history of understanding and living the reality that obstacles are our opportunities…they’re the key to our success. Change is a constant in our business and fighting change is counterproductive. We need you to be good at being uncomfortable and understand that discomfort is the key to growth. Cultivate your own ability to adapt and know that struggling well is something you’ll share with every team you’re on at Shelf. Our company stories are about thriving through real difficulty…together.

Win Together - We win or lose as a team. Always. Everything you do here is connected to the rest of the organization. Part of our shared team environment demands full honesty…real candor and directness with one another. We expect you to constantly be thinking about how to support your teammates and the company, always acting in service to our shared mission and what’s best for the organization as a whole.

About Shelf

The enterprise is going agentic — but most AI agents fail when they hit real business complexity. Shelf is changing that.

We’ve built the operating system for agentic AI: a platform that models your policies, workflows, and operational logic into an AI Data Model so agents don’t just respond — they reason. The result? AI that understands how your business actually runs and delivers precise, compliant, auditable outcomes at scale.

Brands like Amazon, Nespresso, HelloFresh, and KeyBank trust Shelf to power AI agents that resolve 85% of cases autonomously, cut handle times by 20–25%, and turn hours-long processes into seconds. We’re partnered with Microsoft, Salesforce, OpenAI, Snowflake, and Databricks — and recognized by Gartner (Cool Vendor) and IDC (Innovator) for our approach.

If you want to sell the infrastructure that makes agentic AI actually work in the enterprise, you’re in the right place.

Our mission is to empower humanity with better answers everywhere.

Summary

The R&D department plays a pivotal role in driving Shelf to disrupt the market. We are looking for Machine Learning experts that are able to deliver end to end with a blend of experience: Python engineering, ML engineering, and pragmatic Data science and Machine learning research. You will ship end-to-end features—from problem framing and experimentation to service deployment, and ongoing operations—quickly and with high quality. Your work will power ML- and LLM-driven services used by top enterprises like Amazon, Mayo Clinic, AmFam, and Nespresso.

This role requires strong Python engineering capabilities coupled with a strong ability to deliver robust ML solutions, along with ML research literacy to choose sound methodologies, define metrics, and evaluate different approaches effectively.

You’ll work in an agile environment, move fast, and own what you ship.

Responsibilities

• Own end-to-end delivery: ideate, research, prototype, productionize, and operate ML-powered services with an expectation to iterate and ship frequently
• Stand up robust training/evaluation pipelines: dataset curation, labeling/feedback loops, experiment tracking, offline/online metrics, and A/B testing
• Solve problems using sound methodology, evaluate approaches along with 
• Transform ML models and LLM workflows (including RAG) into reusable, versioned, observable production services with CI/CD
• Collaborate with Product Owners to shape our product and requirements
• Conduct and receive code reviews; champion engineering excellence, testing discipline, and documentation
• Leverage AI coding assistants to accelerate development and create internal agents that automate parts of the engineering workflow
• Share learnings through demos, docs, and knowledge sessions; contribute to a culture of continuous improvement

Requirements

• 3+ years of professional experience researching and shipping ML-based solutions, with strong Python skills and a track record of delivering fast without sacrificing quality
• Proven experience in owning research problems end-to-end, starting from initial data analysis, through iterative research phases to delivering on production
• Practical NLP/LLM experience: transformers, embeddings, prompt design, and evaluation; ability to choose and justify metrics and methodologies
• Strong backend fundamentals: designing RESTful services, schema design, data modeling, and performance tuning for SQL and NoSQL stores
• Data processing skills: pandas/NumPy; experience with batch/stream processing and ETL orchestration (e.g., Airflow, Step Functions)
• Strong English verbal and written communication

As a plus

• LLM ops and safety: eval frameworks (e.g., RAGAS), guardrails, red-teaming, prompt optimization at scale
• Model optimization: quantization, distillation, pruning; GPU/accelerator-aware serving
• Experience with AWS ML stack (SageMaker, Batch, Step Functions, Lambda, SQS/SNS, DynamoDB, ECS, EC2, S3)
• Vector databases and search: Pinecone, Elasticsearch, pgvector, FAISS, or DeepLake
• Background in reinforcement learning, agent frameworks, or autonomous agents
• Publications, open-source contributions, GitHub portfolio

What Shelf Offers

• B2B contract
• Company Stock Options
• Hardware: MacBook Pro
• Modern technical stack. Develop open-source software
• Premier AI development environment: GitHub Copilot, Claude Code, OpenAI, TypingMind, v0, MCP Servers, plus credits to experiment with emerging AI tools

Why Shelf

• Our Leadership Team has deep knowledge management and AI domain expertise and enterprise SaaS background to execute this plan
• We love our customers and our customers love us. Ask a Shelf customer why, and they’ll tell you it’s because of our innovative capabilities, rock-solid reliability, they truly enjoy working with our people, but most of all – it’s the improvements they see in their business KPIs.
• We have raised over $60 million in funding and our investors include Tiger Global, Insight Partners, Connecticut Innovations, and others
• We have high velocity growth powered by the most innovative product in our category, 3X growth for 3 years in a row
• We now have over 100 employees in multiple U.S. states and European countries, and we have ambitious hiring goals over the next few months

Our Values:

Quality - We’re united by our focus on world‑class Quality. Quality in all things – starting with everything that leaves your desk. Everything you touch – every email, report, campaign, and piece of code – should be outstanding. Your work product should blow people away. Having people look at what you’ve done and say, “Wow.” That’s the standard here. Remember that how you do anything is how you do everything. Focus on craftsmanship—your ability to make things better.

Momentum - for us means that you should know that the things you’re responsible for are moving forward. When you look around and see something that’s stalled, get it moving again. We pride ourselves on “ball movement.” When your boss or team leaves you with something, they should return to see measurable progress. Small, continuous movement is our recipe for success. Constantly look for how to make the work around you move forward. We want you to initiate solutions, ideas, and progress. Don’t wait for it to come to you—reach out and create movement. All the time.

Accountability - We expect every team member to feel that they are accountable for more than anyone might normally expect. Each of us should feel real responsibility for things even at the edge of our control. We consistently share and align on expectations, give each other open and respectful feedback, and use those two drivers to ensure that every agreement we make with one another is clear and complete.

Hard Work - We’re here to do something difficult together. We care intensely about the mission and we expect that from our teammates. That care means that we work hard here. Hard work comes with long hours, extra effort…and real opportunity at Shelf. Your passion for creating and sustaining output is a part of our DNA. Support each other, cheer each other on, drive the mission forward. Great teams sustain intense effort together to win.

Learning Agility - We’re innovating in one of the fastest‑moving spaces in history at a time of accelerating global change. That’s incredibly exciting and requires each of us to commit fully to learning each and every day so that we can be the best at what we do. None of us know everything. All of us can learn anything. Staying open and constantly curious is a key success driver at Shelf. It also requires humility. We prize people who are consistently humble and open to making mistakes and growing from them. Recognize also that learning itself is a skill…we need you to be really good at it. Keep dialing in your own understanding about how you learn best and push yourself to keep growing.

Adapt and Thrive - Overcoming challenges lives deep in our DNA. We have a proud history of understanding and living the reality that obstacles are our opportunities…they’re the key to our success. Change is a constant in our business and fighting change is counterproductive. We need you to be good at being uncomfortable and understand that discomfort is the key to growth. Cultivate your own ability to adapt and know that struggling well is something you’ll share with every team you’re on at Shelf. Our company stories are about thriving through real difficulty…together.

Win Together - We win or lose as a team. Always. Everything you do here is connected to the rest of the organization. Part of our shared team environment demands full honesty…real candor and directness with one another. We expect you to constantly be thinking about how to support your teammates and the company, always acting in service to our shared mission and what’s best for the organization as a whole.

• Paid time off
• Flexible work hours
• 100% remote work
• Equity shares in a rapidly growing company backed by top-tier VCs
• A culture built on innovation that values big ideas
• We work in Central European Time*
• Newest MacBook + Setup Fee ($500)

About the role

As an Engineering Manager II on our Platform Organization you will lead two squads that are foundational to how Housecall Pro scales: Search Platform and Identity & Access Management (IAM).

The Search Platform squad owns the infrastructure and tooling that powers search across our product - enabling domain teams to build fast, relevant search experiences. The IAM squad is responsible for building the core identity and access control layer - establishing scalable APIs for authentication and authorization, and enabling new user types and security models as the business grows.

Both squads operate as platform and enablement teams: they build the technical foundations that product and domain teams rely on to ship safely and at pace. You will drive the strategic direction for these areas and create the conditions for your engineers to do their best work.

This is a role for someone who thrives at the intersection of people leadership, technical depth, and cross-functional influence. You will partner closely with your Director, Staff Engineers, Product, and domain teams to translate business needs into platform capabilities.

Compensation: 9500 - 10200 USD per month

👉*We work in CET, but this role will occasionally require sync meetings with the US team, which may shift your workday to finish later in the afternoon (6:00 PM), as we operate with flexible hours.

What you do Each Day

• Lead and manage two platform engineering squads: Search Platform and IAM
• Drive the technical and strategic direction for search infrastructure (Elasticsearch, observability, developer-facing APIs) and identity & access management (authentication, authorization, RBAC, session management)
• Partner with your Director and Staff Engineers to shape architecture decisions that support scalability, reliability, and a long term platform roadmap
• Enable domain teams to build on top of your platforms effectively - through clear APIs, documentation, training, and hands-on consultation
• Mentor and develop senior and staff-level engineers, fostering a culture of accountability and technical excellence
• Monitor team health, progress, and delivery - removing roadblocks and ensuring your squads maintain momentum on high-impact work
• Manage performance through regular feedback, career development conversations, and performance reviews
• Champion observability, developer experience, and operational excellence across both platform domains
  
  

Qualifications

• 7+ years of experience in software engineering
• 4+ years in a people leadership or management role, ideally leading multiple teams or squads
• Hands-on experience applying AI and LLM-based tools to accelerate engineering workflows, code quality, and team productivity
• Proficiency in modern programming languages and frameworks (e.g., JavaScript, Python, Node.js, React, Ruby)
• Familiarity with search technologies (e.g., Elasticsearch), identity and access management patterns, or similar platform domains
• Experience with distributed systems architecture and high-traffic, large-scale applications
• Proven track record of delivering complex software projects on time and within scope
• Experience enabling other teams through APIs, documentation, and developer tooling
• This position requires fluency in both Polish and English

What will help you succeed

• Proven experience driving team efficiency or output quality through the strategic use of AI tools and automation
• Ability to lead through influence and build trust with senior technical individual contributors
• Strong strategic thinking with the ability to map technical debt and platform needs to business value
• Excellent communication skills for navigating complex, cross-functional stakeholder environments
• Resiliency and adaptability in a fast-paced, high-growth startup environment

*This role is open to candidates inside Poland. The specific salary for the successful candidate will be determined based on permissible, non-discriminatory factors such as skills and experience. 

**This job description serves as an outline only. Due to business needs, you may be required to perform job duties that are not within your written job description. Furthermore, we may revise, add to, or delete from your job duties per business needs.

We are looking for a Senior ML Platform Engineer to join our ML Platform team to build, evolve and scale AI Infrastructure that powers Bolt's intelligent services

With over 200 million customers in 50+ countries, Bolt is one of the fastest-growing tech companies in Europe and Africa. And it's all thanks to our people.

We believe in creating an inclusive environment where everyone is welcome, regardless of race, colour, religion, gender identity, sexual orientation, age, or disability.

Our ultimate goal is to make cities for people, not cars, and we need your help to achieve this mission!

The ML Platform Team makes ML/AI easy at scale. We streamline development, testing and deployment of ML/AI systems for hundreds of real-time algorithms. 

We own training orchestration, an inference software stack and infrastructure, and a Feature Store, including VectorSearch and RAG tooling. We develop LLM tools and CI/CD for ML, covering the whole range of ML infrastructure needs.

Our tech stack includes TypeScript, Python, Spark (batch and structured streaming), Airflow, n8n, MLflow, LiteLLM, AWS SageMaker, Redis, Elasticsearch, Docker, Kubernetes, AWS (S3, EKS), Terraform, Great Expectations. 

• Designing, building, and optimising components of Bolt’s ML Platform.
• Optimise and extend our in-house Feature Store Platform serving billions of data points in real-time.
• Tune infrastructure (k8s and AWS) and build automations to achieve the best cost-performance.
• Proactively solve technical challenges, discover and build new features, enabling develop efficiency.
• Support our internal users and help with troubleshooting, and turn user problems into scalable solutions.
• Raise our product and technical quality bar, promoting software engineering best practices.

• 5+ years of experience in Software Engineering, out of which 2+ in ML/MLOPS/AI Engineering.
• Experience in leading and delivering complex cross-team projects.
• Production experience with Python, Spark, and Kubernetes.
• Experience in MLOPS and AI ecosystem, and developing end-to-end ML/AI solutions at scale.
• You strive for technical excellence while staying pragmatic to achieve outcomes for the users.

Experience is great, but what we really look for is drive, intelligence, and integrity. So even if you don’t tick every box, please consider applying!

• Accelerate your professional growth with unique career opportunities.
• Enjoy a rewarding salary and stock options, knowing that as Bolt succeeds, so do you.
• Take care of your physical and mental health with our wellness perks.
• Celebrate 5 years at Bolt with a 1-month paid sabbatical to recharge.
• Connect with colleagues at annual company events and smaller team gatherings.
• Balance flexibility and in-person collaboration with our hybrid model, including at least 12 monthly in-office days.

*Some perks may differ depending on your location and role.

We are looking for a Senior ML Platform Engineer to join our ML Platform team to build, evolve and scale AI Infrastructure that powers Bolt's intelligent services

With over 200 million customers in 50+ countries, Bolt is one of the fastest-growing tech companies in Europe and Africa. And it's all thanks to our people.

We believe in creating an inclusive environment where everyone is welcome, regardless of race, colour, religion, gender identity, sexual orientation, age, or disability.

Our ultimate goal is to make cities for people, not cars, and we need your help to achieve this mission!

The ML Platform Team makes ML/AI easy at scale. We streamline development, testing and deployment of ML/AI systems for hundreds of real-time algorithms. 

We own training orchestration, an inference software stack and infrastructure, and a Feature Store, including VectorSearch and RAG tooling. We develop LLM tools and CI/CD for ML, covering the whole range of ML infrastructure needs.

Our tech stack includes TypeScript, Python, Spark (batch and structured streaming), Airflow, n8n, MLflow, LiteLLM, AWS SageMaker, Redis, Elasticsearch, Docker, Kubernetes, AWS (S3, EKS), Terraform, Great Expectations. 

• Designing, building, and optimising components of Bolt’s ML Platform.
• Optimise and extend our in-house Feature Store Platform serving billions of data points in real-time.
• Tune infrastructure (k8s and AWS) and build automations to achieve the best cost-performance.
• Proactively solve technical challenges, discover and build new features, enabling develop efficiency.
• Support our internal users and help with troubleshooting, and turn user problems into scalable solutions.
• Raise our product and technical quality bar, promoting software engineering best practices.

• 5+ years of experience in Software Engineering, out of which 2+ in ML/MLOPS/AI Engineering.
• Experience in leading and delivering complex cross-team projects.
• Production experience with Python, Spark, and Kubernetes.
• Experience in MLOPS and AI ecosystem, and developing end-to-end ML/AI solutions at scale.
• You strive for technical excellence while staying pragmatic to achieve outcomes for the users.

Experience is great, but what we really look for is drive, intelligence, and integrity. So even if you don’t tick every box, please consider applying!

• Accelerate your professional growth with unique career opportunities.
• Enjoy a rewarding salary and stock options, knowing that as Bolt succeeds, so do you.
• Take care of your physical and mental health with our wellness perks.
• Celebrate 5 years at Bolt with a 1-month paid sabbatical to recharge.
• Connect with colleagues at annual company events and smaller team gatherings.
• Balance flexibility and in-person collaboration with our hybrid model, including at least 12 monthly in-office days.

*Some perks may differ depending on your location and role.

We are looking for a Senior ML Platform Engineer to join our ML Platform team to build, evolve and scale AI Infrastructure that powers Bolt's intelligent services

With over 200 million customers in 50+ countries, Bolt is one of the fastest-growing tech companies in Europe and Africa. And it's all thanks to our people.

We believe in creating an inclusive environment where everyone is welcome, regardless of race, colour, religion, gender identity, sexual orientation, age, or disability.

Our ultimate goal is to make cities for people, not cars, and we need your help to achieve this mission!

The ML Platform Team makes ML/AI easy at scale. We streamline development, testing and deployment of ML/AI systems for hundreds of real-time algorithms. 

We own training orchestration, an inference software stack and infrastructure, and a Feature Store, including VectorSearch and RAG tooling. We develop LLM tools and CI/CD for ML, covering the whole range of ML infrastructure needs.

Our tech stack includes TypeScript, Python, Spark (batch and structured streaming), Airflow, n8n, MLflow, LiteLLM, AWS SageMaker, Redis, Elasticsearch, Docker, Kubernetes, AWS (S3, EKS), Terraform, Great Expectations. 

• Designing, building, and optimising components of Bolt’s ML Platform.
• Optimise and extend our in-house Feature Store Platform serving billions of data points in real-time.
• Tune infrastructure (k8s and AWS) and build automations to achieve the best cost-performance.
• Proactively solve technical challenges, discover and build new features, enabling develop efficiency.
• Support our internal users and help with troubleshooting, and turn user problems into scalable solutions.
• Raise our product and technical quality bar, promoting software engineering best practices.

• 5+ years of experience in Software Engineering, out of which 2+ in ML/MLOPS/AI Engineering.
• Experience in leading and delivering complex cross-team projects.
• Production experience with Python, Spark, and Kubernetes.
• Experience in MLOPS and AI ecosystem, and developing end-to-end ML/AI solutions at scale.
• You strive for technical excellence while staying pragmatic to achieve outcomes for the users.

Experience is great, but what we really look for is drive, intelligence, and integrity. So even if you don’t tick every box, please consider applying!

• Accelerate your professional growth with unique career opportunities.
• Enjoy a rewarding salary and stock options, knowing that as Bolt succeeds, so do you.
• Take care of your physical and mental health with our wellness perks.
• Celebrate 5 years at Bolt with a 1-month paid sabbatical to recharge.
• Connect with colleagues at annual company events and smaller team gatherings.
• Balance flexibility and in-person collaboration with our hybrid model, including at least 12 monthly in-office days.

*Some perks may differ depending on your location and role.