Senior QA Engineer

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About this role

Senior QA Engineer New York, NY, United States 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 QA Engineer to help build the quality assurance function from the ground up. You'll define how we test, what we test, and when code is ready to ship. This means building automated test infrastructure, establishing release processes, and hiring a small team to scale the function. This is a foundational hire. You're not coming in to run test cases someone else wrote. You're coming in to decide what quality looks like at Polymarket. What you'll do - Automated Test Infrastructure: Build automated test suites from scratch covering web, backend APIs, and critical trading flows. We recommend TypeScript and Playwright, but you'll have input on the stack. - Release Quality: Define and own the release testing process. Work with the TPM to ensure releases are structured, tested, and still shipping fast. - Product Coverage: Deeply understand

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