Senior Front-end Engineer

Job description

RESPONSIBILITIES - Own the front-end architecture of a high-throughput, real-time trading application. - Design, build, and maintain production-grade applications using Next.js, React, and TypeScript. - Implement pixel-accurate, accessible, and responsive UI systems under strict performance budgets. - Lead complex feature development end-to-end, from technical design to production rollout. - Optimize rendering paths, state management, data flow, and bundle size for sub-second interactions. - Integrate deeply with REST and WebSocket APIs powering live market data and execution flows. - Collaborate tightly with product, design, and backend engineers on advanced trading workflows. - Set and uphold engineering standards around code quality, testing, performance, and maintainability. - Mentor other engineers and raise the bar for front-end execution across the team. - Contribute across the stack when needed (API design, data models, infra tradeoffs). REQUIREMENTS - 6+ years of professional front-end engineering experience, with clear ownership of complex production systems. - Expert-level mastery of React, Next.js, and TypeScript in high-performance environments. - Deep understanding of front-end architecture, rendering behavior, and performance optimization. - Proven experience with real-time data systems (WebSockets, streaming updates, event-driven UI). - Strong instincts around state management, data consistency, and UI correctness under load. - Comfort reasoning about backend systems (Node.js, databases, cloud infrastructure); hands-on experience is a plus. - Track record of shipping and maintaining features that operate at scale. - Ability to make high-leverage technical decisions independently. NON-NEGOTIABLE - Speed — in execution, iteration, and UI responsiveness. - Obsession with performance, not just aesthetics. - High ownership, low ego, zero tolerance for sloppy systems. PREFERRED - Prior experience in fintech, trading platforms, or other latency-sensitive products. - Open-source contributions or technically substantial side projects. - Comfort operating in fast-moving, high-accountability startup environments.