Senior Software Engineer (React Native)

Epassi; Finland; On-site; EUR 90,000 - 130,000; Full time

Job summary

Epassi in Finland is seeking a Senior Software Engineer (React Native) to join a cross-functional team building a modern mobile app for our European users. You will own mobile-specific areas, shape architecture, and contribute to long-term growth.

The role emphasizes collaboration with product, design, backend, QA, and DevOps, writing clean TS/React Native code, ensuring quality, performance, and security, and participating in agile ceremonies.

Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, or equivalent practical experience.
• Experience delivering mobile applications end-to-end.

Responsibilities

• Designing, building, and maintaining a high-quality React Native mobile application.
• Contributing to scalable, modular, and maintainable mobile architecture.
• Ensuring high standards for code quality, testing, performance, and security.
• Collaborating with Product, Design, Backend, QA, and DevOps.

Skills

React Native

TypeScript

Mobile architecture

REST GraphQL

Agile ceremonies

AI-assisted tooling

Copilot

Cursor

Claude

Education

Bachelor's degree in CS/SE or equivalent

Tools

Copilot

Cursor

Claude

Job description

Are you interested in joining of Europe's fastest growing companies? Do you want to impact the wellbeing of millions of employees? If yes, then keep reading and join us to make an impact in a fast-paced and dynamic environment where you’ll play a key role in boosting everyday wellbeing, at home, at work. Everywhere!

Epassi’s purpose is to boost everyday well-being. We are a leading provider of employee benefit solutions across Europe. We were established in Finland in 2007, and in 2008 we were the first company to launch a mobile-payable employee benefit payment solution in Europe. Since then, we have consistently grown, diversifying our products and introducing our services into new markets.

Epassi has been awarded by the Financial Times as one of the fastest-growing companies in Europe on multiple occasions.

We are currently hiring Senior Software Engineer (React Native) to be based in either Finland, Germany, Poland, UK, Netherlands, Sweden or UK. The preferred location is Finland or Germany.

Your mission at Epassi:

You will be part of a cross-functional product team responsible for building and evolving a modern mobile application that supports Epassi’s product vision. We are adding this role to strengthen our mobile engineering capabilities and to establish a solid, scalable foundation for a React Native app that is built for long-term growth. In this role, you will take ownership of mobile-specific system areas, contribute to architectural decisions, and help shape how we build, operate, and continuously improve our mobile solutions across the Epassi group.

Your responsibilities will be:

• Designing, building, and maintaining a high-quality React Native mobile application
• Contributing to a scalable, modular, and maintainable mobile architecture
• Ensuring high standards for code quality, testing, performance, and security
• Collaborating closely with Product, Design, Backend, QA, and DevOps
• Actively contributing to architectural discussions and technical improvements

You’ll be successful in this role if you:

• Deliver a stable and scalable mobile app with a clean, well-structured codebase
• Establish and evolve architectural patterns that support long-term development
• Take ownership and responsibility for the quality and reliability of mobile features
• Proactively identify and reduce technical debt
• Communicate clearly and work effectively within a cross-functional team
• Support reliable delivery and smooth operation following a "you build it, you run it" mindset

What you’ll be doing (daily):

• Developing mobile features using React Native and TypeScript
• Shaping and refining the mobile app architecture with scalability and modularization in mind
• Writing clean, testable, and maintainable code
• Reviewing code and providing constructive feedback to peers
• Integrating REST and/or GraphQL APIs in collaboration with Backend Engineers
• Working closely with Product Owners and Designers to refine requirements
• Monitoring app behavior, analyzing issues, and supporting incident resolution
• Supporting build, release, and deployment processes for iOS and Android
• Participating in agile ceremonies such as planning, refinements, reviews, and retrospectives
• Documenting architectural decisions and technical solution
• Leverage AI-native development tools and workflows (e.g., Copilot, Cursor, Claude) to accelerate delivery, improve code quality, and set the standard for AI-assisted engineering practices across the team.

Your track record:

• Successfully delivered mobile applications or major features end to end
• Contributed to or shaped scalable mobile architectures
• Taken ownership of technical areas in long-lived software products
• Improved code quality, testing practices, or system stability in previous roles
• Worked constructively with product and design stakeholders to deliver user value
• Bachelor’s degree in Computer Science, Software Engineering, or equivalent practical experience

Why You Should Join Us

• Be part of an ambitious growth journey and join a global community of driven, bold, entrepreneurial, yet humble Epassians in a company that is constantly evolving.
• Work with a clear purpose — boosting everyday wellbeing — and create a meaningful, positive impact on both individuals and society.
• Thrive in an open and inclusive culture with low hierarchy, where relationships are built on respect, camaraderie, and shared successes and challenges.
• Come as you are — we’ll bring out the best in you and support your personal and professional growth.
• Join a fast-growing tech company with a strong financial foundation, offering opportunities to grow and make an impact together with us.
• Benefit from an inspiring and supportive work environment where employee wellbeing is a true priority.
• Contribute to solidifying our position as the number one player in Europe’s employee benefit market and help shape the next wave of success.