Senior Web Engineer

ABOUT POLYMARKET Polymarket is the world's largest prediction market platform. We enable individuals to express views on real-world events by trading on outcomes across politics, economics, sports, culture, and current affairs. Built as a peer-to-peer marketplace with no centralized "house," Polymarket aggregates diverse opinions into transparent, market-based probabilities that reflect collective expectations about the future. We're growing fast — both in terms of volume ($21B traded in 2025) and adoption as an alternative news source. Our ambition is to become a ubiquitous beacon of truth in global media and we need your help adding fuel to the fire. ABOUT THE ROLE Polymarket is looking for a Senior Web Engineer to own complex frontend features, improve reliability, and help us ship faster with confidence. You'll own major web surfaces end-to-end: from scoping and implementation through launch, monitoring, and production support. This is a high-ownership role at the intersection of frontend product development, backend systems, performance, and reliability. You should be comfortable shipping complicated React/Next.js features, debugging ambiguous production issues, and working across teams without needing hand-holding. We want someone who can move fast, make strong technical decisions, and help raise the quality bar for our frontend systems. WHAT YOU'LL DO -

• Own and ship complex features end-to-end.
• Build and launch web features across Polymarket's core product surfaces, making thoughtful tradeoffs between speed, quality, architecture, and long-term maintainability. -
• Collaborate across the stack.
• Work closely with backend engineers to design APIs, reason through data flows, and build reliable user experiences on top of complex systems.
• Partner with QA, TPM, product, and design to clarify requirements, manage launches, and improve product quality. -
• Own reliability and incident response for your domain.
• Monitor dashboards, alerts, and user reports to identify and respond to issues quickly.
• Work with backend and infrastructure teams during incidents to isolate root causes, ship mitigations, and follow through with fixes and prevention work. -
• Improve frontend observability.
• Build and improve the logs, metrics, alerts, dashboards, and error reporting that give the team visibility into how our frontend systems are performing. - Raise the engineering bar.
• Identify meaningful technical debt, propose pragmatic refactors, and contribute to system design discussions that evolve our frontend architecture as the product scales.
• Lead by example through strong code reviews, clear communication, and high-quality execution. - Tie technical work to outcomes. Connect your work to measurable results – performance, reliability, product quality, and conversion – and help break down ambiguous product requirements into shippable engineering work. WHAT WE'RE LOOKING FOR - 3–5+ years of frontend web engineering experience -
• Strong hands-on experience with React, Next.js, TypeScript, and modern frontend development -
• Strong frontend system design instincts across state management, data fetching, caching, performance, reliability, and maintainability -
• Experience owning complex features from scoping through launch -
• Strong debugging skills and experience responding to production issues -
• Comfortable working with backend engineers on APIs, data contracts, failure modes, and system behavior - High agency: you notice problems, propose solutions, and drive work to completion - Product-minded: you care about user experience, not just implementation - Able to operate independently in a fast-moving, ambiguous environment - Clear communicator during planning, launches, bugs, and incidents - (Plus) Frontend performance specialization - (Plus)
• Experience with high-traffic, real-time, marketplace, trading, or financial products - (Plus)
• Experience in crypto, Web3, or adjacent financial infrastructure - (Plus)
• Experience building for WebViews or shared web/mobile surfaces - (Plus)
• Experience improving frontend observability, alerting, or reliability practices - (Plus)
• Strong practical use of AI tools to improve engineering productivity BENEFITS - Competitive salary & equity - Unlimited PTO - Full Health, Vision, & Dental coverage - 401k match - Hardware setup: new MacBook Pro, big display, & accessories