Senior Frontend Engineer

Trading 212 is a trading and investing platform serving over 6 million clients with €38 billion in assets. They are hiring a Senior Frontend Engineer to own complex features across web and mobile using a shared TypeScript monorepo with React, React Native, and React Native Web.

• Own complex frontend features end to end across web and mobile.
• Design and evolve React and React Native systems, shared libraries and durable abstractions.
• Identify and resolve rendering, state-management, bundle and runtime-performance bottlenecks.
• Use TypeScript to make behaviour explicit and prevent defects rather than suppressing type errors.
• Work closely with product, backend engineering and QA to turn complex requirements into simple user experiences.
• Keep quality high through code review, unit, end-to-end and visual-regression testing.
• Share knowledge, mentor colleagues and raise the frontend engineering standard.

• Proven ownership of production frontend systems built with React or React Native and TypeScript.
• Strong knowledge of React rendering, component boundaries, data flow and state management.
• A track record of designing maintainable frontend architecture and reusable abstractions.
• Practical experience diagnosing performance problems in complex web or mobile products.
• Sound testing judgement across unit, end-to-end and visual-regression coverage.
• Clear, structured problem-solving and the ability to explain technical decisions and trade-offs.
• Strong engineering fundamentals, product judgement and confidence learning unfamiliar technologies.
• Depth in one frontend ecosystem and sound tool choice matter more than familiarity with every technology listed.