The salary range for this role is 3,500 - $6,000 per month (Gross in USD)

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 Mobile 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.

Compensation

The compensation range for the role is as follows:

• 3,500 - $6,000 per month (Gross in USD)

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:

• Help own and build out new features within our cross-platform TypeScript React Native app, and Golang backend APIs.
• Manage our releases, using tools like cohorting, feature flags, and app-store infrastructure to ensure a safe rollout to our millions of active users.
• Maintain a strong working relationship with product, design, and the business to ensure stakeholder needs are being evaluated and met.
• Work with the team to continuously build clean, scalable, robust, and testable code.
• Develop a deep working knowledge of your application, data domain, and KPIs.

What We Look For:

• 3+ years of professional mobile development experience, with at least 2+ years in React Native or similar technology such as Flutter.
• Experience working with native code on iOS (Swift/ObjC) and Native Android (Kotlin/Java).
• Experience developing and delivering a mobile application to Apple and Google’s mobile app stores.
• Deep understanding of React Native architecture, hooks, context, navigation patterns, and performance optimization.
• Strong familiarity with unit testing, integration testing, and E2E testing (Jest, React Native Testing Library, Detox, Appium, etc.).
• Ability to lead features end-to-end — from requirements, design, implementation, deployment, monitoring, and improvement.
• Experience mentoring junior or mid-level engineers.
• Capable of performing high-quality code reviews with focus on maintainability, clarity, and best practices.
• Drives technical decisions, proposes improvements, and elevates code quality across the team.
• Works well with product managers, designers, backend teams, and QA.
• Bachelor's degree in computer science
• Knowledge of mobile CI/CD pipelines (Fastlane, Bitrise, GitHub Actions, etc.).

Preferred Knowledge and Skills:

• Knowledgeable in writing automated tests for applications (unit, integration, end-to-end), and implementing them in a CI environment.
• Ability to solve problems with backend-focused languages like Go, Python, Java or similar.
• Familiarity with typical microservice architecture composed of HTTP APIs.
• Experience working with native code on iOS, Android.

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.

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

The salary range for this role is $2,200 - $6,000 per month (Gross in USD)

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 Mobile 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.

Compensation

The compensation range for the role is as follows:

• Mid: $3,500 - $6,000 USD per month
• Junior: $2,200 - $3,500 USD per month

Key Role Responsibilities: 

• Help own and build out new features within our cross-platform TypeScript React Native app, and Golang backend APIs.
• Manage our releases, using tools like cohorting, feature flags, and app-store infrastructure to ensure a safe rollout to our millions of active users.
• Maintain a strong working relationship with product, design, and the business to ensure stakeholder needs are being evaluated and met.
• Work with the team to continuously build clean, scalable, robust, and testable code.
• Develop a deep working knowledge of your application, data domain, and KPIs.

What We Look For:

• 3+ years of professional mobile development experience, with at least 6+ months in React Native or Similar technology such as Flutter.
• Experience developing and delivering a mobile application to Apple and Google’s mobile app stores.
• Strong familiarity with modern Frontend Development, Javascript or Typescript, and building applications with React Native, or similar cross-platform framework.
• Deep understanding of React Native architecture, hooks, context, navigation patterns, and performance optimization.
• Understanding of relational databases like MySQL.
• Strong familiarity with unit testing, integration testing, and E2E testing (Jest, React Native Testing Library, Detox, Appium, etc.).
• Ability to lead features end-to-end — from requirements, design, implementation, deployment, monitoring, and improvement.
• Capable of performing high-quality code reviews with focus on maintainability, clarity, and best practices.
• Drives technical decisions, proposes improvements, and elevates code quality across the team.
• Works well with product managers, designers, backend teams, and QA.
• Bachelor's degree in computer science

Preferred Knowledge and Skills:

• Ability to solve problems with backend-focused languages like Go, Python, Java or similar.
• Familiarity with typical microservice architecture composed of HTTP APIs.
• Experience working with native code on iOS, Android.
• Knowledge of mobile CI/CD pipelines (Fastlane, Bitrise, GitHub Actions, etc.).

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.

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 the Team:

Fraîche is CookUnity’s premium smart fridge platform for workplaces, providing fresh, chef-crafted meals, snacks, and drinks right in the office with 24/7 availability. Employees can browse a diverse menu on the Fraîche mobile app and use it to unlock the IoT-enabled fridge and grab their food – no pre-ordering required. As part of CookUnity’s B2B division (CookUnity for Business), Fraîche extends the company’s chef-led dining experience into offices, transforming how people eat at work.

We are seeking a Senior Backend / Platform Engineer with strong backend engineering experience and the ability to contribute to our mobile app as needed (approximately 70% backend / 30% mobile). In this role, you will maintain and evolve our platform capabilities powering the Fraîche experience — including backend services built with PHP and Symfony, data systems (PostgreSQL, Elasticsearch), message queues, Redis, and infrastructure operations. You will also contribute to the Fraîche mobile app (Flutter preferred, React Native acceptable) for hardware-aware and user-facing features. If you are excited about backend development, platform reliability, automation, and building products that bridge the digital and physical worlds, this role is for you!

Responsibilities:

• Develop & Improve Platform and Services: Build new backend features and enhance existing functionality in our PHP/Symfony services that power the Fraîche mobile app and operational tooling. Ensure reliable integrations across PostgreSQL, Elasticsearch, message queues, and Redis.
• Infrastructure & Platform Support: Own and improve platform reliability, scalability, and operational excellence. The system currently runs on Upsun infrastructure; help maintain and optimize it while preparing for a potential migration from Upsun to AWS in the near future.
• Collaborate on Migration Strategy: Work with the team to plan and gradually implement a potential migration of infrastructure (and related components) to AWS, aligning with CookUnity’s broader B2B tech stack. Be open to adopting new tools and best practices as the platform evolves.
• Cross-Functional Collaboration: Partner closely with frontend/mobile engineers, backend and full-stack engineers across B2B (including Fraîche) to integrate APIs and ensure smooth end-to-end functionality. Work with product managers and operations teams to refine requirements and improve user workflows.
• Hardware & IoT Integration (Backend Focus): Implement backend solutions that support interaction with our smart fridge hardware — for example, secure fridge unlock workflows, real-time inventory updates, and robust event processing via message queues. Bring creative ideas to make fridge-user interactions more seamless and automated.
• Mobile Contributions (Approx. 30%): Contribute to the Fraîche mobile app to support hardware-aware flows and critical user journeys, ideally using Flutter (or React Native). Collaborate with mobile-focused engineers to ensure app changes integrate cleanly with backend services.
• Quality & Best Practices: Write clean, maintainable code with proper architecture, testing, and observability. Participate in code reviews and ensure high performance, reliability, and responsiveness across backend systems. Contribute to documentation, deployment processes, and continuous improvement initiatives.

Qualifications:

• Backend Experience (PHP/Symfony): Senior-level backend engineer with multiple production experiences building and deploying backend systems using PHP and Symfony (or comparable frameworks). Demonstrated ownership of services, APIs, and production operations.
• Data Stores & Search: Strong experience working with PostgreSQL and Elasticsearch, including data modeling, indexing strategies, and performance tuning.
• Async Processing & Caching: Proficiency with message queues (publish/consume patterns, retries, idempotency) and Redis (caching, rate limiting, locks, pub/sub as applicable).
• Platform & Infrastructure Mindset: Comfort operating and supporting production systems, debugging incidents, improving reliability, and collaborating on infrastructure initiatives. Familiarity with PaaS environments (e.g., Upsun/Platform.sh-style systems) and interest in cloud platforms like AWS.
• Front-End Fundamentals (Mobile Contribution): Ability to contribute to mobile development (about 30% of the role), ideally with Flutter or React Native, focusing on integrating backend APIs and supporting critical user flows.
• Adaptability: Interest or exposure to evolving stacks and willingness to learn new technologies that align with our platform direction, including a potential Upsun → AWS migration.
• Team Collaboration: Good communication skills and experience working in cross-functional teams. Ability to collaborate with product, design, mobile, and backend engineers to deliver features from concept to release.
• Language Skills: Intermediate or higher proficiency in English (written and spoken), comfortable working in an international, distributed team environment.
• Fluency with AI engineering tools.

Preferred requirements:

• IoT/Hardware Integration: Familiarity with systems that interact with hardware or IoT devices. Enthusiasm for connecting software with physical products – bonus if you’ve worked on projects involving scanners, MQTT, RFID/NFC, or smart devices.
• Cloud & Migration Experience: Experience planning/executing migrations (infrastructure or platform) and working with AWS services in production environments. Understanding of networking, security, IAM concepts, and cloud operations.
• Observability & Reliability: Experience with logging/metrics/tracing, alerting strategies, and incident response practices. Ability to improve SLOs/SLAs through pragmatic engineering.
• Agile & Remote Work: Comfortable with agile development methodologies and asynchronous collaboration. Experience using tools like Jira/Trello for task tracking and Slack/Meet for remote communication.
• Continuous Improvement: A proactive mindset toward improving code quality and developer experience. Experience with CI/CD pipelines, automated testing, and release processes is a plus.
• Startup Mindset: Thrives in a fast-paced, innovative environment. Previous experience in a startup or product-focused team where you wore multiple hats is advantageous.

Learn More About CookUnity

We believe great leadership starts with alignment on vision, values, and ways of working. To give you deeper insight into who we are and what we’re looking for, we invite you to explore: CookUnity's Leadership Principles – The values and behaviors that guide how we operate, collaborate, and scale.

We hope this provides valuable insight into our culture and product vision. If this excites you, we’d love to connect!

Benefits

💸 Get paid in USD!

🗺 Work remotely: design the life that you want.

⛱ Enjoy 15 business days of vacation each year from the start date.

🎄16 fully paid Argentinean holidays.

🩺 Healthcare Benefit: Monthly stipend to use in your preferred healthcare provider.

🗓️ 5-year Sabbatical: After 5 years with CookUnity, you get a 4-week paid sabbatical.

🐣 Paid family leave.

🕯 Compassionate Leave: 3-5 days each time the need arises.

🧘🏽‍♀️ Customize the benefits that suit your needs! Access a range of perks tailored to you, including learning opportunities, wellness memberships, delivery apps, and more through our comprehensive benefit platform.

🧑‍🏫 Personalized English coach.