Senior Frontend Engineer, React & TypeScript Lead

Trading212; London; On-site; NOK 1,141,000 - 1,648,000; Full time

Job summary

Trading212 is seeking Senior Frontend Engineers to own complex frontend features across web and mobile. You will design and evolve React/React Native systems, optimize rendering and performance, and work with product, backend, and QA to deliver simple user experiences.

You’ll maintain high quality through testing, code reviews and mentoring, contributing to durable abstractions and shared libraries across the frontend platform.

Qualifications

• 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.

Responsibilities

• 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.
• 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.

Skills

React

React Native

TypeScript

Frontend architecture

Performance optimization

Testing (unit/e2e)

Code review

Mentoring

Tools

Jest

Playwright

Detox

TanStack Query

Zustand

Job description

Trading212 is seeking Senior Frontend Engineers to own complex frontend features across web and mobile. You will design and evolve React/React Native systems, optimize rendering and performance, and work with product, backend, and QA to deliver simple user experiences.

You’ll maintain high quality through testing, code reviews and mentoring, contributing to durable abstractions and shared libraries across the frontend platform.