Web Platform Lead Engineer

Polymarket

$250K — $500K *
Information Technology
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • Deep experience in web performance engineering at significant scale (billions of page loads).
  • Strong expertise across the web performance stack: rendering, caching, CDN configuration, and optimization.
  • Proficiency in JavaScript and TypeScript with knowledge of browser engines and network interactions.
  • Experience with real user monitoring and synthetic performance testing.
  • A rigorous, measurement-driven approach to solve performance issues.
  • Technical leadership experience in influencing performance practices across teams.
  • (Plus) Experience with Next.js, React, and modern SSR/SSG strategies.
  • (Plus) Familiarity with edge computing and CDN-level programmability.

Responsibilities

  • Own web performance end-to-end for Polymarket's web platform.
  • Set the technical direction for performance architecture and tooling.
  • Optimize the critical rendering path to eliminate loading bottlenecks.
  • Drive caching and CDN strategy to minimize latency.
  • Build performance observability with real user monitoring and tracking.
  • Set the performance standards and benchmarks across the engineering team.

Benefits

  • Competitive salary & equity
  • Unlimited PTO
  • Full health, vision, & dental coverage
  • 401k match
  • Hardware setup: new MacBook Pro, big display, & accessories
Full Job Description
About the Role

Polymarket's web team ships to production many times a day across our Next.js apps. This role owns the systems that make that velocity safe: the AI tooling, observability, alerting, and performance discipline that tell us - with evidence, automatically - that the site is fast and correct after every ship.

This is a hands-on architect role with a clear foundation to build on. The center of gravity is agentic tooling - building the AI-driven review, QA, verification, and release machinery the web team leans on daily. The rest is the observability, alerting, and performance foundation that machinery stands on.

What You'll Do
  • Build and maintain agentic workflows that give every web engineer leverage: PR review agents, automated verification of fixes against production data, perf-regression detection and bisection, release gates
  • Define the performance budget for Polymarket web and enforce it automatically - in CI, at the edge, and in RUM
  • Instrument what matters: real-user metrics tied to the surfaces where users trade, not vanity lab scores
  • Own the alert lifecycle end to end - from detector to dashboard to the engineer who acts on it; kill flaky signals and make green mean shippable
  • Set the architecture bar for how the web team measures, ships, and verifies - and automate it so the bar holds at high velocity
  • Own Core Web Vitals, real-user monitoring, bundle and rendering budgets, and caching and streaming strategy for Polymarket web
  • Maintain one coherent, trustworthy picture of production web health across errors, traces, and RUM
  • Own regression detection that fires when something real breaks - performance or correctness - and stays quiet otherwise
  • Build and maintain the views the team and leadership actually use: release health, vitals, error budgets, funnel-critical surfaces
  • Lead a small team from day one - set the direction, raise the bar, and multiply their output while staying hands-on


What We're Looking For
  • Expert in web performance - you can take a slow page and make it fast, and prove the win with real-user data, not lab runs
  • Experience shipping for real users at scale - you've owned a production web app with a large, active user base where a regression hit thousands of users within minutes and monitoring was how you knew
  • Deep Next.js experience: App Router, React Server Components, streaming/PPR, caching layers, hydration cost
  • Experience building AI/agentic developer tooling - or serious automation - that a team relied on daily, with opinions about where agents genuinely help vs. where they add noise
  • Experience owning observability and alerting for a high-traffic production product: instrumentation, dashboards, on-call signal quality
  • Strong systems thinking across the full path: CDN/edge caching, browser internals, measurement bias, backend latency's effect on the frontend
  • Bias for ownership - this domain has no backstop
  • Able to lead a small team while staying hands-on
  • (Plus) Real-money or trading product experience - where latency and correctness both cost money
  • (Plus) Cloudflare at depth: Workers, cache rules, edge telemetry
  • (Plus) Experience running LLM-based code review or test generation at scale


Benefits
  • Competitive salary & equity
  • Unlimited PTO
  • Full Health, Vision, & Dental coverage
  • 401k match
  • Hardware setup: new MacBook Pro, big display, & accessories


Pay Transparency

Base salary range: $250,000 to $500,000 annually, plus equity and benefits.

This range reflects a good-faith estimate for this position. Experience levels vary widely within a title here, so please reach out even if your expectations fall outside it. We're always happy to chat.

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