Senior Web Engineer

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
• Experience with high-traffic, real-time, marketplace, trading, or financial products
• Experience in crypto, Web3, or adjacent financial infrastructure
• Experience building for WebViews or shared web/mobile surfaces
• Experience improving frontend observability, alerting, or reliability practices
• 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