Own and evolve the front-end architecture for a high-throughput, real-time trading app using Next.js, React, and TypeScript. Build pixel-accurate, accessible, responsive UIs under strict performance budgets; optimize rendering, state management, data flow, and bundle size for sub-second interactions. Integrate with REST and WebSocket APIs, lead end-to-end feature development, set engineering standards, mentor engineers, and contribute across the stack when needed.

Design, implement, and maintain automated test suites validating frontend flows, backend APIs, and on-chain execution. Build deterministic tests for order lifecycle, slippage, fees, and state reconciliation; run tests in local chain/testnet environments; integrate with CI/CD; triage failures and collaborate with engineers to improve testability and ensure high-confidence releases.

Design, build, and maintain high-performance Next.js + TypeScript front-end applications. Implement responsive, accessible UIs, optimize rendering and bundle size, integrate with REST and WebSocket APIs, contribute to back-end work as needed, uphold testing and documentation standards, and mentor junior engineers.