Staff Web Engineer

📋 Description Lead web performance across Legend, profiling and shipping speed improvements Deep dive into JavaScript internals, rendering pipelines, and real-time data Build and optimize high-frequency UI handling streaming market data Establish performance benchmarks and monitoring systems for repeatable standards Drive a performance-first culture through code reviews and docs Contribute to end-to-end feature development across Legend's trading surfaces 🎯 Requirements 7+ years of experience building web apps with performance focus Deep expertise in JavaScript and TypeScript, including engine internals and GC Experience profiling browser rendering pipelines and diagnosing jank Proven ability to build high-frequency, real-time UI with streaming data (Canvas/Web Workers/WebSockets a plus) Fluency with performance tooling and measurement: Chrome DevTools, Performance/Lighthouse, Core Web Vitals 🎁 Benefits Challenging, high-impact work to grow your career Performance-based compensation with bonuses, equity, and 401(k) matching Best-in-class benefits including 100% paid health insurance for employees Lifestyle wallet - flexible benefits spending account Employer-paid life & disability insurance, fertility benefits, and mental health benefits Time off to recharge including holidays, PTO, sick time, and parental leave