Lead Performance Web Engineer

Polymarket•New York, NY

About The Position

Polymarket is looking for a Lead Web Performance Engineer to own the speed, efficiency, and scalability of our web platform. You'll set the direction for web performance at Polymarket, establish the standards and systems that keep the product fast at scale, and shape how Polymarket thinks about performance as a discipline. We're looking for someone who has operated at serious scale (ie billions of page loads) and knows what it takes to make a high-traffic web product fast for every user, everywhere. You'll come in with deep technical conviction and lay the foundation for a world-class web performance practice.

Requirements

Deep experience in web performance engineering at significant scale – you've worked on systems serving billions of page loads and know what breaks at that level
Strong expertise across the web performance stack: rendering, caching, CDN configuration, bundle optimization, and Core Web Vitals
Proficiency in JavaScript and TypeScript, with a strong understanding of how browser engines, the V8 runtime, and the network layer interact
Experience with real user monitoring, synthetic performance testing, and building observability systems that surface regressions before users feel them
A rigorous, measurement-driven approach: you don't guess at performance problems, you profile, instrument, and prove them
Technical leadership experience: you've set direction, raised the bar across a codebase, and influenced how a broader engineering team thinks about performance

Nice To Haves

Experience with Next.js, React, and modern SSR/SSG rendering strategies at scale
Familiarity with edge computing, worker runtimes, or CDN-level programmability

Responsibilities

Own web performance end-to-end. Take responsibility for load times, rendering performance, and runtime efficiency across Polymarket's web platform, with measurable targets and a clear plan to hit them.
Set the technical direction. Define the architecture, standards, and tooling that govern how Polymarket approaches performance – caching strategy, rendering pipeline, bundle discipline, and edge delivery.
Optimize the critical rendering path. Identify and eliminate bottlenecks in how pages load and render, including server-side rendering, hydration, code splitting, lazy loading, and asset delivery.
Drive caching and CDN strategy. Design and maintain caching architectures at every layer (browser, CDN, and edge) to minimize latency and maximize cache hit rates at scale.
Build performance observability. Instrument real user monitoring, Core Web Vitals tracking, and synthetic testing so the team has continuous, actionable visibility into performance regressions.
Set the performance bar across engineering. Establish benchmarks, budgets, and standards that keep performance a first-class concern as the product and engineering team grow.