Web Platform Lead Engineer

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 RUMInstrument 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 RUMOwn 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-onWhat We're Looking ForExpert 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