Senior Frontend Engineer (Performance)
Core
Senior Frontend Engineer specializing in performance tuning and optimization for high-traffic live streaming platforms.
Role type
Senior IC frontend performance engineer
Builds
High-traffic viewer experiences including search, video playback, and site navigation
Domain
Live streaming / Consumer web
Deliverable
production ML models | product features | dashboards & analysis
Required skills
Modern frontend frameworks (React, Angular, Vue, Svelte), TypeScript, JavaScript, HTML, CSS, Chrome DevTools, React Profiler, Lighthouse, browser internals (JS execution, layout, painting, compositing), memory leak diagnosis, Core Web Vitals optimization, bundle size optimization, code splitting, main-thread work optimization
Preferred skills
Technical leadership, architecture decision influence, mentoring, reusable tooling creation
Technologies
React, Angular, Vue, Svelte, TypeScript, JavaScript, HTML, CSS, Chrome DevTools, Lighthouse
Responsibilities
Diagnose and resolve performance issues (unnecessary renders, long tasks, memory leaks, layout shifts), define and improve performance targets using RUM and synthetic testing, establish performance budgets and dashboards, raise organizational performance capabilities through talks and workshops
Seniority
Senior, hands-on IC with leadership responsibilities
