Senior Software Engineer; React Native

Position: Senior Software Engineer (React Native)
Location: None

Epassi’s purpose is to boost everyday well-being.
We are a leading provider of employee benefit solutions in 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.
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 well‑being, at home, rywhere!
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 Dev Ops
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 Type Script
Shaping and refining the mobile app architecture with scalability and modularisation in mind
Writing clean, testable, and maintainable code
Reviewing code and providing constructive feedback to peers
Integrating REST and/or Graph

QL APIs in collaboration with Backend Engineers
Working closely with Product Owners and Designers to refine requirements
Monitoring app behaviour, analysing 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…