Senior Frontend Engineer
Trading212 · Remote · Poland ·
COMPENSATION
€•• – ••k
Listed on the employer's job board (Ashby)
- Senior level position
- React and React Native
- TypeScript monorepo
- Web and mobile focus
- Autonomous teams
Join a team reinventing trading and investing by creating high-performance products for millions of users. You will work in small, autonomous groups that own their features from problem definition to production, with a weekly release cycle.
The frontend platform spans web and mobile, sharing approximately 95% of code between the two. You will contribute to a TypeScript-based monorepo using React and React Native, focusing on performance, correctness, and clarity at scale.
What you'll do
- Own complex frontend features end-to-end across web and mobile platforms
- Design and evolve React systems, shared libraries, and durable abstractions
- Identify and resolve rendering, state-management, and runtime performance bottlenecks
- Use TypeScript to make behavior explicit and prevent defects
- Collaborate with product, backend, and QA to simplify complex requirements
- Maintain quality through code reviews and comprehensive testing strategies
- Mentor colleagues and raise the overall frontend engineering standard
What you'll need
- Proven ownership of production frontend systems using React or React Native
- Strong expertise in TypeScript for building robust applications
- Deep knowledge of React rendering, component boundaries, and data flow
- Track record of designing maintainable architecture and reusable abstractions
- Practical experience diagnosing performance issues in complex products
- Sound judgment in unit, end-to-end, and visual-regression testing
- Clear problem-solving skills and ability to explain technical trade-offs
Stack
- TypeScript
- React
- React Native
- React Native Web
- Nx
- pnpm
- TanStack Query
- Zustand
- Playwright
- Detox
- Jest
Hiring process
- Initial conversation with a recruiter
- Code review assessment
- Experience deep dive session
- Managerial interview