Engineering at Brex

Engineering at Brex is about building systems that scale with speed and intention. Our teams span Software, Data, Security, and IT, and operate with high autonomy and deep collaboration. We tackle hard technical problems, own our outcomes, and push for excellence at every level — from architecture to deployment. It’s an environment where engineering is a craft, and builders become leaders.

What you’ll do

As a Senior Application Security Engineer, you will focus on finding and responding to security vulnerabilities across the Brex platform. In this role, you will perform code reviews, design reviews, penetration testing, and vulnerability management. You will develop and maintain tooling to perform static and dynamic testing of the Brex platform and tooling which supports secure developer workflows. Application Security is part of our wider Financial Scale organization, which means you will work closely with Security Operations, GRC, Product Security, Front End Platform,  IT Infrastructure teams.

We’re looking for individuals with a strong background and interest in penetration testing. You should have a demonstrated ability to find vulnerabilities in complex systems and craft exploits to demonstrate business impact. This role is highly cross functional and collaborative, you will have the opportunity to work with every engineering team across Brex. You should be enthusiastic about working with a variety of backgrounds, roles, and needs. Building a world-class financial service requires world-class security. 

Brex is pioneering the next wave of AI-driven financial services for dynamic, high-impact companies like Coinbase, Robinhood, and Anthropic. We're at the early stages of integrating AI across our product suite, this role will have the opportunity to influence and secure the future of AI Security at Brex. You'll be at the forefront of securing our novel AI implementations, identifying attack vectors in agentic-powered features, and partnering with product and engineering teams to build AI capabilities that our customers can trust with their critical financial operations.

Responsibilities

• Identifying vulnerabilities, demonstrating business impact, and articulating the risk of specific vulnerabilities to drive prioritization efforts
• Perform penetration testing and design reviews, looking for vulnerabilities and insecure designs, work with engineering and product to design secure product features
• Maintain and build internal tools to automate security efforts, perform SAST and DAST testing of the Brex platform, and support secure development practices
• Build and contribute to a culture of collaborative security excellence through technical leadership, learning sessions, and mentorship within the team and wider organization

Requirements

• 5+ years work experience in an Application Security or related role
• Ability to find vulnerabilities in complex systems, demonstrating business impact through custom attack chains
• Experience with a wide range of secure development activities including— threat modeling, developer education, and incident response
• Knowledge of Python, scripting languages, and AI/agentic workflows to automate tasks, build tools and improve productivity
• Collaborative mindset paired with strong written and verbal communication skills

Bonus points

• Proficiency with Kotlin, gRPC, GraphQL, Kubernetes
• Previous experience as a software engineer
• Consultancy experience performing web application security reviews
• Experience with securing distributed systems in AWS and cloud environments
• Experience with pentesting and securing agentic features and systems
• Contributions to the wider technical community— open source, public research, mentorship, community organizing, blogging, CVEs, presentations, etc
• Experience submitting to bug bounty programs or responsible disclosure programs

Compensation

The expected salary range for this role is $192,000 - $240,000. However, the starting base pay will depend on a number of factors including the candidate’s location, skills, experience, market demands, and internal pay parity. Depending on the position offered, equity and other forms of compensation may be provided as part of a total compensation package.

Brex LLC is a wholly owned subsidiary of Capital One, N.A.

Our product team is growing, and we are looking for a QA Engineer who is excited about mobile to help us deliver a reliable, secure, and seamless experience across all platforms.

You will dive into testing native iOS and Android applications and their integrations, working closely with engineers, product managers, and designers. Your focus will be on validating end-to-end mobile scenarios: from native app behavior and platform-specific edge cases to integrations with frontend web pages and third-party services.

This role is a great fit for someone who is genuinely curious about how mobile products work under the hood, finds it interesting when iOS and Android behave differently under the same conditions and enjoys tracing how a third-party integration affects the user experience end-to-end. If you like asking questions, going deeper than the surface, and growing in a team that treats QA as a shared responsibility, we'd love to meet you.

Responsibilities

• Perform manual testing mobile (native iOS and Android) applications across different platforms and environments
• Perform API testing to verify request/response correctness, data exchange, and error handling
• Perform integration testing between applications to ensure proper communication, data flow, and system consistency
• Analyze technical documentation to understand requirements, specifications, and expected system behavior
• Write and maintain test documentation (test cases, test plans, and other QA artifacts)
• Collaborate with the support team to resolve incidents, investigate bugs, and ensure effective inter-team communication
• Participate in planning and regular team meetings to align scope, priorities, and timelines

Requirements

• At least 1.5 years of commercial experience as a QA Engineer
• Strong understanding of software testing processes, SDLC, and methodologies (Agile/Scrum)
• Experience in mobile (Android Studio, Xcode), API (Postman or similar tools), regression, smoke testing
• Experience with API documentation and testing tools (BrowserStack, GraphQL, etc.)
• Practical experience with relational databases (MySQL, PostgreSQL, etc.)
• Proficiency in log analysis and monitoring tools (Graylog, Grafana, etc.)
• Hands-on experience with test management systems (e.g., TestRail) and with bug tracking systems (e.g., Jira)
• Good knowledge of browser DevTools for troubleshooting
• Experience in writing test documentation
• Good knowledge of version control systems (Git)
• Intermediate level of English proficiency

Will be a plus

• Experience in writing automated tests (Java, Appium)
• Experience with Charles, Fiddler and Proxyman
• Experience working on product teams, especially in fintech

We offer

• 20 paid vacation days per year
• 10 paid sick leave days per year
• Public holidays as per the company’s approved Public holiday list
• Medical insurance
• Opportunity to work remotely
• Professional education budget
• Language learning budget
• Wellness budget (gym membership, sports gear and related expenses)

We are looking for a QA Engineer to join our team and ensure the quality and stability of our trading product.

In this role, you will work closely with developers, product, and support teams to validate functionality across web services and integrations, investigate user issues, and help improve the overall experience. This position involves hands-on web and API testing in a dynamic environment, requiring curiosity, attention to detail, and clear communication.

If you enjoy digging into complex scenarios, collaborating with different stakeholders, and catching issues before they reach users - we would be glad to hear from you!

Responsibilities

• Perform manual testing of web applications to validate functionality, usability, and compatibility across different environments
• Perform API testing to verify request/response correctness, data exchange, and error handling
• Perform integration testing between applications to ensure proper communication, data flow, and system consistency
• Analyze technical documentation to understand requirements, specifications, and expected system behavior
• Collaborate with the support team to resolve incidents, investigate bugs, and ensure effective inter-team communication
• Write and maintain test documentation (test cases, test plans, and other QA artifacts)
• Participate in planning and regular team meetings to align scope, priorities, and timelines

Requirements

• At least 1.5 years of commercial experience as a QA Engineer
• Strong understanding of software testing processes, SDLC, and methodologies (Agile/Scrum)
• Experience in web, API (Postman or similar tools), regression, smoke, performance, load & stress testing
• Experience with API documentation and testing tools (BrowserStack, GraphQL, etc.)
• Practical experience with relational databases (MySQL, PostgreSQL, etc.)
• Experience in log analysis (Graylog, Grafana, etc.)
• Hands-on experience with test management systems (e.g., TestRail) and with bug tracking systems (e.g., Jira)
• Good knowledge of browser DevTools for troubleshooting
• Experience in writing test documentation
• Good knowledge of version control systems (Git)
• Intermediate level of English proficiency

Will be a plus

• Experience in writing automated tests
• Experience working on product teams, especially in fintech

We offer

• 20 paid vacation days per year
• 10 paid sick leave days per year
• Public holidays as per the company’s approved Public holiday list
• Medical insurance
• Opportunity to work remotely
• Professional education budget
• Language learning budget
• Wellness budget (gym membership, sports gear and related expenses)

Engineering at Brex

Engineering at Brex is about building systems that scale with speed and intention. Our teams span Software, Data, Security, and IT, and operate with high autonomy and deep collaboration. We tackle hard technical problems, own our outcomes, and push for excellence at every level — from architecture to deployment. It’s an environment where engineering is a craft, and builders become leaders.

What you’ll do

As an Application Security Engineer, you will contribute to finding and responding to security vulnerabilities across the Brex platform. In this role, you will participate in code reviews, design reviews, penetration testing, and vulnerability management. You will contribute to tooling that performs static and dynamic testing of the Brex platform and supports secure developer workflows. Application Security is part of our wider Financial Scale organization, which means you will work closely with Security Operations, GRC, Product Security, Front End Platform, and IT Infrastructure teams.

We're looking for individuals with a solid foundation in penetration testing and a curiosity for finding vulnerabilities in complex systems. You should have experience identifying and documenting vulnerabilities across common vulnerability classes and be able to communicate their risk clearly to engineering and product teams. This role is highly cross-functional — you'll have the opportunity to collaborate with engineering teams across Brex and grow your security expertise in a fast-moving environment.

Brex is pioneering the next wave of AI-driven financial services for dynamic, high-impact companies like Coinbase, Robinhood, and Anthropic. As we integrate AI across our product suite, this role will give you hands-on experience contributing to AI security at Brex. You'll apply emerging AI security best practices to help secure our agentic features, identify attack surfaces introduced by LLM-powered systems, and partner with product and engineering teams to build AI capabilities our customers can trust with their critical financial operations.

Responsibilities

• Identify vulnerabilities across common vulnerability classes (e.g., OWASP Top 10), document findings clearly, and communicate risk to drive remediation efforts
• Participate in penetration testing and design reviews alongside senior engineers, contributing to the identification of vulnerabilities and insecure designs
• Contribute to internal tooling and automation efforts that support SAST and DAST testing of the Brex platform and promote secure development practices
• Collaborate with engineering and product teams to support the design of secure product features
• Actively contribute to a culture of security awareness through knowledge sharing and peer learning

Requirements

• 4+ years of work experience in Application Security or a related role
• Demonstrated ability to find and document vulnerabilities in complex systems, with clear communication of business risk
• Hands-on experience with a subset of secure development activities, such as code review, threat modeling, or penetration testing
• Experience identifying security risks in AI/ML systems — such as prompt injection, model manipulation, or data poisoning — through work experience, personal projects, CTFs, or bug bounties
• Familiarity with agentic workflows and the ability to reason about attack surfaces introduced by LLM-powered features
• Knowledge of Python or scripting languages to automate tasks and build tooling
• Collaborative mindset paired with strong written and verbal communication skills

Bonus points

• Experience with Kotlin, gRPC, GraphQL, Kubernetes
• Previous experience as a software engineer
• Experience with securing distributed systems in AWS and cloud environments
• Experience with web application security reviews
• Contributions to the wider technical community — open source, public research, CTF participation, blogging, CVEs, or presentations
• Experience submitting to bug bounty or responsible disclosure programs
• Published AI security research or contributions to AI security frameworks

Compensation

The expected salary range for this role is $152,000 - $190,000. However, the starting base pay will depend on a number of factors including the candidate’s location, skills, experience, market demands, and internal pay parity. Depending on the position offered, equity and other forms of compensation may be provided as part of a total compensation package.

Brex LLC is a wholly owned subsidiary of Capital One, N.A.

What you will do: 

Location: Remote — Anywhere (Open to applicants located anywhere around the globe)

Fueled is a leading digital strategy, design, and engineering agency. We are a 300+ person team that has designed and built hundreds of digital products and experiences for brands like Google, Apple, The New York Times, ESPN, Victoria’s Secret, MGM Resorts, Albertsons, and CLEAR.

As a Senior React Native Engineer at Fueled, you will champion the power of React Native to architect, build, and scale high-performance, cross-platform mobile applications that deliver premium user experiences.

Drawing on your prior experience with React for the web, you’ll design end-to-end solutions utilizing React Native, Expo, TypeScript, and Node.js-based back-end integrations. You will rely on strong typing to create robust data models, state management, and application architecture for complex, business-oriented apps.

Additionally, you’ll integrate with REST/GraphQL APIs, implement effective caching strategies, and establish automated mobile CI/CD pipelines to ensure seamless testing, building, and deployment of reliable, real-time functionality at scale.

Your work will turn ambitious ideas into maintainable, future-ready mobile systems that evolve with client needs, raise the bar for quality and performance, and consistently drive measurable outcomes.

Intentionally remote and globally distributed across six continents, our team thrives in a culture that values flexibility, creativity, and cutting-edge technology. Together, we’re shaping the future of digital experiences.

What you will do:

• Architect and build polished, cross-platform mobile experiences that turn user engagement into lasting loyalty. You’ll apply modern React Native (Expo) patterns and tooling to deliver performant applications that feel truly native on iOS and Android.
• Own the end-to-end delivery of key product features, from concept to app store deployment and beyond. You won't just code tickets; you'll shape the technical approach, make critical architectural decisions, and ensure what we ship is robust, scalable, and maintainable.
• Elevate the team’s velocity and craft by introducing, validating, and championing tools and practices that raise the technical bar. You’ll proactively identify bottlenecks – whether in state management, native bridges, or CI/CD pipelines – and implement solutions that make the entire team more effective.
• Bridge the gap between ambitious creative vision and technical reality in a mobile context. You’ll collaborate closely with designers and strategists to challenge assumptions, explore what’s possible on mobile, and deliver solutions that balance exceptional user experience with a first-class developer experience.

What you will achieve:

• From Day 1, you’re shipping a tangible feature for a live client project, building immediate momentum.
• Within the first month, you’ll own and deliver a key mobile feature end-to-end and improve a core performance metric (like app startup time or frame rate) by at least 10%.
• You will enhance team efficiency by creating reusable components, scripts, or processes that are adopted by your peers.
• By end of the project, you’ll have spearheaded a significant project phase from concept to app store launch, on time and to a high standard.
• Your expertise becomes a multiplier, evidenced by positive client or team feedback on your ability to solve complex mobile challenges.

About you:

• You think in cross-platform systems and reusable components. You get genuine satisfaction from designing a React Native architecture that is intuitive, performant, and delivers a consistent, high-quality experience on both iOS and Android.
• You’re a proactive problem-solver who doesn’t wait for perfect requirements. You thrive on digging into ambiguity, asking "why," and prototyping solutions to complex challenges involving native modules, third-party SDKs, and smooth data flow.
• You have a strong point of view, held loosely. You can articulate a compelling case for a specific technology or architectural approach (like state management libraries or navigation patterns) but are equally committed to the team's final decision and its success.
• You see the "full stack" as a single, interconnected challenge. You're comfortable crafting a polished, dynamic mobile UI with React Native and then diving into the back-end logic, API design, or platform-specific native code that makes it all possible.
• You are a natural collaborator and translator, able to explain mobile-specific constraints to designers and strategic goals to other engineers, ensuring the entire multidisciplinary team is building momentum together.

Contractor Fee

Compensation is determined based on a variety of factors including relevant experience, projects, geographic location, and business needs.

Join our Contractor Pool

This role is designed as a contract position, offering you the opportunity to experience our team and culture while showcasing your contributions. When the fit and business needs align, some contractors are invited to explore a transition into full-time roles.

If you are passionate about Fueled's mission and think you have what it takes to be successful in this role, please apply. We'd appreciate the opportunity to review your application. Everyone gets a response.

Upon meeting the necessary criteria, you'll join the Fueled contractor network, granting you access to project invitations tailored to your expertise and availability when they arise.

Any data provided will be processed in accordance with applicable law and our privacy policy. Curious about what to expect during our talent process? Check it out here. #LI-Remote

We don't want you to miss any communication from us! To ensure you receive updates on your application, please add jobs@fueled.com to your contacts list!

Capnexus is a comprehensive services provider. Our team consists of outstanding professionals, highly experienced in designing, building, and supporting retail software. We see ourselves as a build-as-a-service provider who follows a repeatable business pattern that can be applied to a variety of platforms and verticals. Having a culture built on outcomes and delivery at the core of the business, Capnexus is providing its customers with a complete suite of services for software development, system analysis, integration, implementation, and support, as well as the option to engage a single team to perform all the services they require. 

Who You Are and What You'll Do: 

Capnexus is looking for a highly skilled Senior AWS Data Engineer to lead data architecture, pipeline development, and ERP integration for a 12-week AI-powered modernization engagement in the construction industry. This role is focused on designing and implementing the data engineering backbone of an intelligent subcontractor pre-qualification platform, including CMIC ERP API integration, Amazon Textract data extraction pipelines, ETL development using AWS Glue, and data quality validation. This is an exciting opportunity to apply advanced cloud data engineering skills on a platform that leverages generative AI to automate and modernize enterprise workflows. 

Responsibilities: 

• Lead data architecture design, API assessment, and ETL requirements gathering during the Discovery & Design phase. 

• Develop and configure CMIC ERP API integration to establish reliable data exchange between the ERP system and the AWS platform. 

• Design and implement data pipelines using AWS Glue for ETL processing of subcontractor documents and ERP data. 

• Integrate Amazon Textract to extract structured data from insurance certificates, bonding letters, and financial documents. 

• Build and maintain data models to support AI-powered validation, risk profiling, and executive reporting. 

• Configure Amazon S3 data lake architecture to store and manage raw, processed, and curated data assets. 

• Implement AWS Lambda and AWS Step Functions to orchestrate data workflows and automated processing pipelines. 

• Develop and expose data through Amazon API Gateway to support application and dashboard consumption. 

• Ensure data quality, validation, and integrity across all integration points and pipeline outputs. 

• Conduct data integration testing and support user acceptance testing (UAT) for data-dependent features. 

• Collaborate with Full Stack, AI/ML, and DevOps team members to ensure seamless end-to-end data flows. 

• Contribute to knowledge transfer documentation, data pipeline runbooks, and operations guides. 

Qualifications: 

• 5+ years of data engineering experience, with at least 2+ years working in AWS cloud environments. 

• Strong proficiency in SQL and experience with AWS database services including RDS, DynamoDB, and Aurora. 

• Hands-on experience with AWS Glue for ETL development and data pipeline orchestration. 

• Experience integrating with ERP systems or enterprise APIs, with ability to assess and document API capabilities. 

• Working knowledge of Amazon Textract for automated document data extraction. 

• Proficiency with Amazon S3 for data lake design, storage management, and lifecycle policies. 

• Experience with AWS Lambda and AWS Step Functions for serverless data workflow orchestration. 

• Solid understanding of data modeling, data quality validation, and integration testing practices. 

• Familiarity with Amazon API Gateway for exposing data services to downstream consumers. 

• Strong analytical, problem-solving, and communication skills with the ability to work in Agile/Scrum teams. 

Nice to Have: 

• Experience with Amazon Bedrock or AI/ML-integrated data pipelines. 

• Familiarity with CMIC ERP or similar construction industry enterprise resource planning systems. 

• Experience with GraphQL APIs or AWS AppSync. 

• Knowledge of TypeScript or Python for pipeline scripting and Lambda function development. 

• AWS Certification (Data Analytics Specialty, Database Specialty, or Solutions Architect). 

• Background in construction, insurance, or financial services industries. 

"Our Culture": 

At Capstone, the central principles that we all adhere to, and the glue that holds us together, are our keystones. Our four keystones are: 

"A Customer Obsessed, Delivery Focused, Culture" 

• We’re driven to exceed our customers’ expectations by listening, leading, solving problems, and delivering what we promise 

• We aim to be the most dependable and trusted partner serving our customers. TRUST = CONSISTENCY x TIME 

"A Culture of Learning and Sharing" 

• We value “Lifetime Learners”; those who are hungry, competitive, curious, and self-motivated in their pursuit of knowledge. 

• Personal and professional growth depends on teamwork and continuous learning. By sharing knowledge, skills, ideas, and effort, we benefit our customers, ourselves, and our communities. 

• We recognize that the thoughts, feelings, and backgrounds of others are as important as our own. Everyone has something to learn and everyone has something they can teach. 

• Knowledge and ability are valued. Sharing knowledge and helping others learn new capabilities is valued exponentially. 

"A Culture of Growth and Scalability" 

• Growth comes from not establishing barriers in your role. “Cross functional skill sets are valued and help us deliver to our customers in a truly agile fashion. It comes with understanding that when asked to do something new, you will need support, have questions, and make some mistakes along the way. 

• The most elegant solution is a simple solution. Simple doesn’t mean easy. It’s often more difficult to break a complex problem down into simple, scalable terms. We don’t appreciate, or value, over architected solutions or superfluous coding. 

• Time is one of our most precious commodities. Scalability implies being respectful of this and passionate about making the most efficient use of each and every one of our team members time. 

"All Work is Strategic" 

• No matter how small a project or assignment appears, every single engagement is an opportunity for us to prove ourselves, build trust, and develop relationships that last and grow 

• Every task, interaction, and commitment matters 

• Big or small, we execute our plans and strategies with focus, commitment, and passion 

We offer: 

Job Type: Full-time, 1099

Duration: Short-term

Benefits: 

• Remote work 

Capnexus is an equal opportunity employer. We embrace and celebrate diversity and are committed to creating an inclusive and safe environment for all employees. Experience comes in many forms, and we’re dedicated to adding new perspectives to the team. We encourage you to apply even if your experience doesn’t perfectly align with what we have listed. We look forward to hearing from you. 

No Agencies Please! 

💪🏽 What will you do?

We're a small but mighty team looking to build out the rest of our engineering org.

As a software engineer, you'll end up working on everything up and down the stack. You'll spend a lot of time talking to customers, figuring out what the product should be, and jamming with the rest of the team on building and iterating. We'll all be wearing many different hats, so you'll work on and learn a ton about areas adjacent to engineering — design, sales, legal, partnerships, and whatever else you're interested in.

And, most importantly, you'll be building this company with us. There's a lot to figure out. We want to work with folks who care deeply about the process of building the right company: from what operating values we should have, building out the rest of the team, decisions about how we should scale, and everything in between.

Our tech stack is Typescript, React and Next.js on the client, GraphQL API, Node.js + Express on the server, Postgres, and AWS.

⚡️ You'd be a great fit if you…

• Are an experienced engineer with experience leading large-scope projects.
• Previously worked in a fast-paced engineering environment. Ideally, you have experience building complex products or infrastructure end-to-end.
• Obsess over the details, whether it’s getting that user-facing flow or code abstraction just right. We take great pride in things that have a high level of craftsmanship, both inside and outside of work.
• Know when to “move fast and break things”, and when to slow down and think through all of the details to build something robust and scalable.
• Are intellectually curious and enjoy digging into the nuts-and-bolts of how things work.
• Debate without animosity or ego. We thrive on thinking from first principles, questioning assumptions, and always pushing to make things better.
• Care deeply not just about engineering, but about building the right product and company culture. As a founding team member, you’ll have a huge impact on the company’s story.

Cocoon is aware of fraudulent job offers circulating online from individuals impersonating our company. All legitimate openings are posted on Cocoon - Careers. We will never request payment, gift cards, or sensitive financial information at any stage of our hiring process. Official recruiter communications will only come from maddi@cocoon.com or no-reply@us.greenhouse-mail.io email addresses. 

About the role

Grüns is hiring a Staff Full-Stack Engineer, Revenue Systems to lead the development of revenue-critical systems across our Shopify ecosystem, Backend Systems, and Subscription Management. This role will own the architecture and execution of high-impact, in-house builds — including replacing third-party tools like Aftersell and building advanced checkout and post-purchase experiences.

You’ll work cross-functionally with Product, Data, and Growth to translate business requirements into scalable, production-grade systems. This role requires deep Shopify experience and strong full-stack expertise, with a focus on building reliable, high-performance software that directly drives revenue.

This role is part of our remote HQ! We have a fully remote, high-trust work environment - and also come together on a biannual basis for amazing off-sites where we can connect IRL.

In this role, you will:

• Lead the architecture and development of revenue-critical Shopify applications, checkout extensions, and post-purchase systems.
• Build and scale an in-house revenue tool.
• Design and implement robust backend integrations that safely interact with order management, subscription, and fulfillment systems.
• Develop shared platform capabilities including internal authentication systems, event tracking frameworks, background jobs, and developer tooling.
• Productionize analytics models, optimization logic, and decision engines into user-facing software.
• Own projects end-to-end, from ideation and architecture to deployment, monitoring, and iteration.
• Partner cross-functionally with Product, Data, Growth, and Operations to ensure systems align with revenue and experimentation goals.
• Maintain high standards for performance, reliability, scalability, and developer experience.

We're looking for someone who:

• Has 7+ years of experience in Full-Stack Engineering, Product Engineering, or similar roles.
• Has deep, hands-on Shopify experience (Shopify apps, checkout extensions, post-purchase flows are required).
• Has shipped customer-facing e-commerce features with strong UX and performance standards.
• Has expertise in TypeScript/JavaScript and React.
• Has backend experience in Python and/or Node.js.
• Has built production APIs and services (REST and/or GraphQL).
• Has strong knowledge of authentication patterns, background jobs, and third-party integrations.
• Has experience productionizing analytics models or optimization systems into production software.
• Has experience with cloud infrastructure (preferably GCP), including CI/CD, logging, and monitoring.
• Demonstrates strong systems design and backend integration expertise.

Approach to the role:

• Moves quickly and iteratively while maintaining production-grade quality
• Demonstrates high agency and ownership from concept to post-launch monitoring
• Translates ambiguous requirements into clear technical plans and shipped outcomes
• Collaborates effectively with technical and non-technical stakeholders
• Thinks in terms of business impact, revenue leverage, and long-term scalability
• Balances experimentation velocity with system reliability and order flow integrity

To Apply: 

Please enter your info and share a bit about yourself with us below. We ask that you do not use Chat GPT or similar tools to answer these questions, as it is our hope to genuinely get to know you and the way you communicate and think! We do love integrating these tools into our work though, and you’ll hear plenty more about that if you join us.

Compensation & Benefits:

At Grüns, we're committed to providing a competitive total compensation package — grounded in market data that considers our size, stage, industry, and location. For this role, the base salary range is $200,000-$220,000 depending on experience, paired with a comprehensive benefits package designed to support the well-being and growth of our team.

 About the role
 
At Hummingbird, we want to build better software to fight financial crime. Our engineering team is responsible for making that a reality. They dive deep into the problems that make financial crime fighting so difficult and design flexible, scalable solutions that empower our customers to catch the bad guys. Our product sits at the intersection of financial technology, data science, security, policy, law enforcement, and design. As employees at a small startup, software engineers at Hummingbird have the opportunity to wear many hats and learn and grow across a multitude of dimensions. 
 
The Trust team owns the platform that everything else runs on. As a Senior Software Engineer on Trust, you'll work on the infrastructure, security, and platform systems that keep Hummingbird reliable, secure, and ready to scale — including tooling and systems to support our growing base of enterprise customers with complex deployment and compliance requirements.
 

What you'll do:

• Support the underlying infrastructure that enables our platform to help fight financial crime. You’ll build developer tooling, manage our AWS environment using Terraform, make cross-cutting code changes, analyze scaling issues, setup and configure monitoring tools, and identify performance bottlenecks.
• Work with a small, passionate, and experienced team: We're a small team of mostly senior engineers and we love to do great work together. We're fully remote, but we make a strong effort to prioritize, design, and code collaboratively.
• Grapple with the challenges of working in a high security, high stakes environment: We work with some of the most sensitive data you can imagine and provide a critical service to our customers. Security, reliability, and correctness must always come first.
• Influence the overall architecture and hosting strategy: Great ideas come from everywhere. Everyone on the team has a voice in technical discussions, and is trusted to make significant decisions.
• Have the opportunity to grow into leadership: Hummingbird is growing rapidly. As we do, there will be opportunities for engineers to take on new roles in product, technology, or people leadership positions. 

About you:

• 7+ years of experience with cloud hosted web applications, preferably with some startup experience.
• You love digging into complex problems and determining both the root cause and the best solution to fix.
• You're happy spelunking logs and running diagnostic tools to make sure you understand the problem.
• You sail through ambiguity and enjoy jumping around the stack, touching everything from low level networking and file systems to database configuration and high level architecture.
• Iteration is part of the fun. You’re not married to specific ideas or solutions.
• You want your impact to go beyond the lines of code you write.
• Safety first. You care about quality, testing, and security.
• You like digging deeply into new technologies, new domains, or new ideas. You’re always looking for ways to leverage technology, such as AI, to make you and the rest of the team more efficient.
• You want to build something exceptionally valuable and have a real impact on the world. You're excited to get your hands dirty in pursuit of that goal.
• (Bonus) Experience in the financial sector, especially around compliance or fraud.

Technologies we use and teach:

• AWS, Azure, PostgreSQL, Redis
• Terraform, CircleCI, Nix, Docker
• Ruby/Rails, Python
• OpenAI
• React, JavaScript, TypeScript, GraphQL, d3 

Location: 

Remote (International OK)

While our operations are centered in the United States and preference will be given to candidates located within the US, we welcome international applicants who can ensure some overlap with US time zones, including US Pacific Time (UTC−07:00). This arrangement supports effective collaboration and synchronization with our team.

About Us:

Ameelio is a pioneering non-profit committed to using technology to make a significant social impact. Our mission encompasses the development and implementation of innovative tech solutions that improve the lives of incarcerated individuals and their families. We focus on enhancing communications and expanding educational opportunities within correctional facilities, which are crucial for maintaining family connections and supporting rehabilitation.

By providing free and accessible communication tools, we help preserve essential support structures that significantly reduce recidivism. We also challenge the unjust practices of incumbents in the industry who impose high costs on communications, ensuring that families, especially those least able to afford these fees, can stay connected without financial burden.

Join us in our mission to empower educators, improve familial connections, and fight against systemic exploitation in the communication services for incarcerated individuals and their families.

Technologies we use:

• TypeScript
• GraphQL
• React
• React Native
• WebRTC
• ffmpeg
• Docker
• Github Actions
• Kubernetes

Position Overview:

Responsibilities:

• Implement full stack changes on Ameelio Connect
• Support team members with regular code reviews
• Release and support changes in production
• Create maintainable code with appropriate tests and types
• Investigate and recommend solutions to issues reported by customers 
• Identify opportunities for improved code quality and procesS

Who we’re looking for:

• Works independently on medium and large features, seeking advice when making decisions not specified by the change request.
• Takes ownership of released changes, building confidence through automated tests, feature flags, and real-user monitoring.
• Considers impact on actual users when making decisions and prioritizing efforts.
• Motivated by delivering value to actual people
• Growth-oriented with low ego

Bonus experience:

• WebRTC
• ffmpeg
• Audio stream processing
• Video stream processing

Benefits:

• Competitive salary and excellent benefits package.
• Opportunity to contribute to a meaningful mission that positively (and measurably) impacts society.
• Ability to strongly shape the development/outcome of the product, lay a sustainable foundation, and set the team up for long-term success.
• Be an early part of a high-impact startup that has a bright future ahead of it.
• Work with a talented, passionate team committed to making a difference.
• Enjoy a great work/life balance

Salary:

We aim to offer competitive compensation that aligns with local standards while reflecting the significance of the role and the expertise brought by the ideal candidate.

This is a product-engineering role: not “build what you’re told,” but shape what we build—own the problem, propose solutions, and ship outcomes that matter to users and the business.

About the role

We’re hiring a Senior Full-Stack Engineer with product vision. You’ll build end-to-end features across React/TypeScript and Python/Django, shaping APIs, data models, and background jobs while keeping UIs fast, accessible, and trustworthy. You’ll partner early with PM/Design to frame problems, prototype to learn, and make pragmatic scope calls—so complex, data-heavy workflows feel simple, performant, and reliable.

Responsibilities

• Build full-stack features: React/TypeScript on the client; Django/REST services, data models, and background jobs on the server.
• Own outcomes, not tasks: refine scope, suggest trade-offs, propose simpler approaches, and land increments that deliver value fast.
• Design clean API contracts and evolve schemas/migrations; improve performance and reliability (query tuning, caching, job orchestration).
• Partner with Product & Design from discovery to delivery: clarify user jobs, write lightweight RFCs/PRDs, and shape scope and milestones.
• Keep UIs accessible and responsive; add solid error-handling and failure-mode UX.
• Raise engineering standards: testing strategy, code quality, observability hooks, resilience patterns.
• Partner with Support to investigate production issues, reduce UX papercuts, and turn learnings into fixes.
• Engage with our open-source community (issues, discussions) to understand real-world needs and improve developer experience.
• Participate in architecture discussions and code reviews; mentor teammates and improve patterns across the codebase.
  
  

What you’ll bring

• Senior-level experience shipping production full-stack features (React/TypeScript + Python/Django + SQL).
• Strong product sense: you’ve made scope/trade-off decisions and iterated based on real-world usage and feedback.
• Fluency with modern FE tooling (e.g., Vite/Webpack, Jest/Cypress) and state-management patterns.
• Backend depth: REST API design, relational modeling, migrations, performance tuning, and background job patterns.
• Excellent communication at a Senior IC level—you write clear RFCs/PRDs, give actionable reviews, and present trade-offs well.
• Nice to have: GraphQL familiarity; Kafka/queues/streaming; Spark/BigQuery; auth/RBAC; multi-tenant SaaS; design-system experience.
  
  

Our stack

Python/Django, JS/TS, React, OpenAI API, Spark, BigQuery, Kafka, Jest, Cypress, AWS, Kubernetes, Postgres, Redis.

How we build

Trunk-based development with small, reviewable PRs; feature flags for safe rollouts; strong code reviews; pragmatic testing; and close collaboration with Product/Design/Support.

How we work

At HumanSignal, we follow a six-week cycle known as "Build and Ship" followed by a "Cooldown." During the first four weeks, the team focuses on creating new features and shipping improvements. We also rotate a small group to handle customer support, ensuring everyone stays in touch with real user needs and we can respond quickly to issues.

After those four weeks, we have a two-week "Cooldown" period. This is when we tackle technical debt, refine our integration processes, and wrap up those lingering tasks that never quite fit into regular sprints but really help us feel good about our codebase and workflows.

Location & Compensation

At HumanSignal we pay based on regional compensation market rate ranges across the globe. We are hiring for this role across North and South America as well as Europe. The base cash compensation range is $140,000 to $200,000 USD. These ranges are provided by market data and are in good faith. The final offer details are determined by several factors including candidate experience, expertise, as well as applicable industry knowledge and may vary from the pay ranges listed above.

It’s an exciting time at HumanSignal. We’re growing quickly, and roles evolve as we learn. We’ve put thought into your first initiatives, but we’ll refine them together. If this sounds exciting, come build with us.

This is a product-engineering role: not “build what you’re told,” but shape what we build—own the problem, propose solutions, and ship outcomes that matter to users and the business.

About the role

We’re hiring a Senior Backend Engineer with product vision. You’ll design and operate services in Python/Django that power labeling and evaluation workflows at scale: clean API contracts, robust data models, efficient background jobs, and dependable performance. You’ll partner early with PM/Design/FE to frame problems, prototype to learn, and make pragmatic scope calls—so complex workflows feel simple, reliable, and fast for users.

Responsibilities

• Design, build, and operate backend services/APIs in Python/Django with Postgres/Redis.
• Own outcomes, not tasks: refine scope, suggest trade-offs, and land increments that deliver value quickly and safely.
• Model data and author migrations; tune queries and caching; manage background jobs/queues for high-volume workflows.
• Evolve API contracts with FE; keep interfaces clear, versioned, and resilient to change.
• Improve reliability and performance (timeouts, retries, idempotency, rate limits, pagination, backpressure).
• Implement secure, multi-tenant patterns: auth, permissions/RBAC, auditability, and safe data boundaries.
• Contribute to testing strategy (unit/integration), error handling, and graceful failure modes.
• Partner with Support to investigate production issues and turn learnings into fixes and prevention.
• Engage with our open-source community (issues, discussions) to understand real-world needs and improve developer experience.
• Participate in architecture discussions and code reviews; mentor teammates and improve patterns across the codebase.
  
  

What you’ll bring

• Senior-level experience shipping production backends in Python/Django (or a close equivalent) and SQL.
• Strong product sense: you’ve made scope/trade-off decisions and iterated based on real-world usage and feedback.
• Depth in REST API design, relational modeling, migrations, and performance tuning.
• Experience with background processing/queues (e.g., Celery/RQ/Kafka-backed workers) and operational concerns.
• Clear written communication at a Senior IC level—concise RFCs/PRDs, actionable reviews, and crisp decision records.
• Nice to have: GraphQL familiarity; Kafka/streaming; Spark/BigQuery; security/compliance exposure; multi-region architectures.
  
  

Our stack

Python/Django, JS/TS, React, OpenAI API, Spark, BigQuery, Kafka, Jest, Cypress, AWS, Kubernetes, Postgres, Redis.

How we build

Trunk-based development with small, reviewable PRs; feature flags for safe rollouts; strong code reviews; pragmatic testing; and close collaboration with Product/Design/Support.

How we work

At HumanSignal, we follow a six-week cycle known as "Build and Ship" followed by a "Cooldown." During the first four weeks, the team focuses on creating new features and shipping improvements. We also rotate a small group to handle customer support, ensuring everyone stays in touch with real user needs and we can respond quickly to issues.

After those four weeks, we have a two-week "Cooldown" period. This is when we tackle technical debt, refine our integration processes, and wrap up those lingering tasks that never quite fit into regular sprints but really help us feel good about our codebase and workflows.

Location & Compensation

At HumanSignal we pay based on regional compensation market rate ranges across the globe. We are hiring for this role across North and South America as well as Europe. The base cash compensation range is $140,000 to $200,000 USD. These ranges are provided by market data and are in good faith. The final offer details are determined by several factors including candidate experience, expertise, as well as applicable industry knowledge and may vary from the pay ranges listed above.

It’s an exciting time at HumanSignal. We’re growing quickly, and roles evolve as we learn. We’ve put thought into your first initiatives, but we’ll refine them together. If this sounds exciting, come build with us.

We are seeking a skilled Full-Stack Developer for one of our distinguished clients. Our client is a technology company that specializes in transforming brand safety and contextual advertising through advanced AI and machine learning solutions. They deliver sophisticated content analysis across multiple media formats, providing granular insights into content risk, sentiment, and thematic elements that go beyond traditional keyword-based approaches.

This role involves developing scalable applications and backend infrastructure that powers next-generation brand safety and content suitability platforms. You'll work across the entire technology stack, utilizing your expertise in Python, API development, browser automation frameworks, CI/CD processes, and large language models to create innovative solutions and maintain high-performance systems.

Key Responsibilities

• Design, develop, and maintain scalable APIs and backend infrastructure for processing and delivering brand safety and content suitability data
• Build integrations with third-party advertising ecosystem platforms including DSPs, SSPs, and CDPs
• Deploy machine learning models and business logic into production environments
• Create and optimize client-facing JavaScript implementations for publishers, focusing on performance, privacy compliance, and cross-browser functionality
• Maintain data accuracy and integrity throughout all system layers
• Build and enhance web applications ensuring optimal functionality and user experience across the full stack
• Take ownership of complete product features from conception through deployment
• Design and manage database systems, optimizing performance while ensuring data security
• Perform code reviews, debugging, and troubleshooting to maintain software quality standards
• Utilize AI tools, models, and capabilities to enhance product offerings
• Research and implement emerging technologies, tools, and development best practices

Required Qualifications

• 10+ years of software engineering experience
• Bachelor's degree in Computer Science, Software Engineering, or related technical field
• Advanced proficiency with backend programming languages and frameworks (Node.js, Python, Go, Java) including REST and GraphQL API development
• Extensive experience with cloud platforms (AWS, GCP, Azure), containerization (Docker), and automated deployment processes (CI/CD)
• Experience with event streaming technologies (Kafka, Kinesis) and large-scale data processing systems
• Strong skills in modern front-end development (React, Vue, or equivalent) with emphasis on performance and security for embedded implementations
• Comprehensive knowledge of API integration and working with large language models
• Proficiency in front-end technologies including HTML, CSS, and JavaScript frameworks (React, Angular, Vue)
• Solid experience with database management systems (MySQL, MongoDB, and similar)
• Excellent analytical and problem-solving capabilities with strong attention to detail
• Strong communication skills and collaborative team working abilities
• Commitment to continuous learning and staying current with industry developments and best practices

This position offers the opportunity to contribute to cutting-edge advertising technology solutions while working with a forward-thinking team focused on innovation and measurable impact for advertisers and publishers.

What are you waiting for? Fill out the form below and apply!

We are looking for a high-functioning psychopath to help bring the next wave of hybrid web2/3 applications.

You will be joining a team of top-tier self-selected sado-masochists, who work here because they can’t really work anywhere else. We value rapid communication and direct feedback, both internal and external. Breakneck pace shipping, autonomy and ownership, and constant experimentation are table stakes. Apologies in advance.

What Sparks Your Enthusiasm

• Shipping nonsense to billions of users
• That point of a futile debugging session where you start to question your sanity and everything becomes hilarious
• Finding interesting/troubling ways to solve engineering problems
• “Huh, that’s weird”, gives you a sense of giddy panic
• A constant feeling like your spinal column has been struck by lightning

What Turns You Away

• “It works on my machine”
• “The user should be able to figure it out”
• “That isn’t my problem”
• Feeling generally calm and in control of the situation

Requirements:

• Typescript
• React
• Self-destructive tendencies
• CSS Frameworks (Tailwind, MUI, etc.)
• Medically significant but non-terminal caffeine addiction
• Experience with Git/Github in a distributed team
• Experience integrating with REST/GraphQL/GRPC APIs
• Security Minded
• Comfort in a young, chaotic, rapidly evolving small team startup environment
• Ability to pick up and learn new stacks and tools on zero notice

Nice to haves:

• Cosm.js or Web3.js experience, general experience developing with crypto focused javascript libraries.
• Experience with NPM release best practices
• Experience working with and configuring bundlers (Webpack, Vite, etc.)
• Experience with browser and mobile data storage, ie LocalStorage, SQLite
• Performance conscious development, as the majority of the global user base is on mobile phones
• Integration and unit testing experience

Day-to-Day Responsibilities:

Actual: 

• Desperate banging on keyboard
• Ripping hair out over encoding errors
• Not learning from previous mistakes about encoding errors
• Ripping hair out over encoding errors

Formal:

• Design Implementation: Work closely with the design team to bring concepts to life, using provided designs as a foundation while exercising autonomy in execution.
• Feature Development: Take ownership of features from planning to release, including scoping, task management, and prioritization.
• Documentation Analysis: Research and review available documentation to guide development, navigating and interpreting scarce or ambiguous resources.
• Testing and Debugging: Conduct thorough testing and extensive debugging to ensure high-quality deliverables, iterating through multiple cycles as needed.
• Collaboration: Engage with the protocol team to facilitate smooth integration of features, providing technical guidance and feedback.
• Continuous Improvement: Participate in the release process, ensuring stability and performance, and contribute to ongoing improvements and refinements.

Cultural:

• Take on new features or bug fixes, with full ownership
• Scoff at the lack of documentation in our field
• “Reverse engineer” protocol level … stuff… to integrate into client
• Debug, debug, debug
• Release and iterate