Leverage LLM's to accelerate development while still producing production-ready code.
Leverage LLM's to build agentic flows to automate tasks and improve productivity.
Design, develop and maintain features in a large, multi-product React web application used by professional traders globally.
Own performance end to end: profile, measure and optimise real-time UI updates (tables, order books, charts, order forms) so the app stays responsive under heavy WebSocket throughput.
Build and evolve the WebSocket and Web Worker layer that powers live market data, balances, positions and order updates across the app.
Set the standard for high-quality code through reviews, mentorship and constructive feedback to engineers across the team.
Contribute to technical strategy: architecture, data flow, state management, component design and shared libraries used across the trading surfaces.
Safeguard performance improvements with regression-resistant patterns, instrumentation, dashboards and alerts, so wins do not silently erode over time.
Own observability for the features you ship: meaningful Sentry instrumentation, Mixpanel events, structured logs and actionable alerts.
Write integration and component tests.
Drive process improvements (engineering practices, tooling, build pipeline, AI-assisted workflows) and lead by example.

4+ years of experience in software development, with a focus on production web applications.
Deep understanding of JavaScript/TypeScript and strong proficiency with the modern React ecosystem.
Experience building real-time UIs with WebSockets and Web Workers.
Strong React and JavaScript performance skills.
Experience working with LLM coding tools (Cursor, Claude, Copilot or similar) to accelerate development while still producing production-ready code.
Hands-on experience with React Query or similar.
Practical experience with production user monitoring and observability.
Experience with frontend testing at multiple levels.
Comfortable with feature flagging and progressive rollouts.
Familiarity with modern frontend build pipelines and tooling (rsbuild/webpack/SWC, monorepos, TypeScript project references, ESLint, Prettier, Husky).
Strong understanding of UI/UX best practices and design-system driven development.
Experience within a large technology organization or fast-growing startup.
Strong written and verbal communication skills in English.

Software Engineer II – Frontend

Key skills