Front-End Engineer (React) : Trading : £120-180k plus excellent bonus : London

We’re partnering with a high-performance quantitative trading firm to hire a Front-End Engineer with deep React experience to work on the firm’s internal trading, research, and risk platforms.

This is a front-end role for engineers who care about architecture, performance, and correctness, and who want to build interfaces used by traders and quantitative researchers making real-time decisions.

The Role

You’ll own and evolve complex, data-heavy web applications that visualise live market data, research outputs, and trading activity. The emphasis is on robust engineering, not marketing websites — accuracy, latency, and usability matter.

You’ll work closely with backend engineers, quants, and traders to design interfaces that are fast, reliable, and intuitive under pressure.

Key Responsibilities

• Design and build complex React applications used in live trading and research workflows
• Develop reusable, well-structured component libraries and front-end architecture
• Optimise rendering performance for real-time and high-frequency data visualisation
• Collaborate with backend teams on APIs, data contracts, and system design
• Write well-tested, maintainable code with a strong focus on correctness and usability

Core Technical Requirements

• Strong professional experience with React and modern JavaScript / TypeScript
• Deep understanding of front-end architecture, state management, and component design
• Experience handling large, dynamic data sets in the browser
• Strong grasp of performance optimisation (rendering, memoisation, data flow)
• Experience working in a Linux / Git-based engineering environment

Additional Technologies (Nice to Have)

Experience with one or more of the following is a strong plus:

• Next.js or similar modern React frameworks
• WebSockets, streaming data, or real-time UI updates
• D3.js, charting libraries, or custom data visualisation
• Backend languages such as Python, C++, Java, or Go
• Familiarity with GraphQL, RESTful APIs, or event-driven systems

Nice to Have (But Not Required)

• Exposure to financial markets, trading systems, or time-series data
• Experience working closely with quantitative or highly technical users
• Knowledge of testing frameworks and front-end tooling (Jest, Playwright, etc.)
• Interest in UI/UX design, without sacrificing engineering rigour