Senior Frontend Engineer React/TypeScript Ownership

Trading 212; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Trading 212 is seeking a Senior Frontend Engineer to own complex features across web and mobile. You will shape front-end systems, libraries and durable abstractions within our TypeScript/React ecosystem, ensuring performance and quality from problem definition through production.

Join teams with weekly releases and autonomous groups, collaborating with product, backend engineering and QA to deliver simple, delightful user experiences.

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.
• Track record of designing maintainable frontend architecture and reusable abstractions.
• 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 ability to explain technical decisions and trade-offs.

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/visual)

Code review

Problem solving

Job description

Trading 212 is seeking a Senior Frontend Engineer to own complex features across web and mobile. You will shape front-end systems, libraries and durable abstractions within our TypeScript/React ecosystem, ensuring performance and quality from problem definition through production.

Join teams with weekly releases and autonomous groups, collaborating with product, backend engineering and QA to deliver simple, delightful user experiences.