Senior Android Engineer at Polymarket in New York, NY

Job description

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 Android Engineer to help build a world-class trading app on Android. Millions of users follow markets, track positions, and make trades on their phones — and the Android experience needs to match that level of engagement. This is a high-ownership role for someone who understands what it takes to build a great trading or wagering experience on mobile: the performance requirements, the real-time data challenges, the UI patterns that make fast-moving information feel intuitive rather than overwhelming. You'll raise the bar across the Android codebase and help take a product that's already at scale to the next level. What You'll Do • Build and own Android features spanning payments flows, real-time market data, and core UI with full accountability from design handoff through to production • Implement polished, performant interfaces with Jetpack Compose that hold up under real trading conditions and meet a high bar for feel and reliability • Contribute to CI/CD pipelines and Gradle configuration so the team can ship with confidence and without friction • Build and maintain integrations across WebSockets, gRPC, and streaming data to power the live market features traders depend on • Collaborate effectively with a distributed team, communicate clearly across time zones, and make good decisions without needing close oversight • Actively incorporate AI tools into your development workflow to move faster and maintain a high output bar • Identify gaps in Android architecture and engineering practices and surface them early, before they become problems at scale What We're Looking For • Strong, current experience with Kotlin — the kind where you can speak concretely to tradeoffs and have opinions • Strong, current experience building UI with Jetpack Compose in production apps • Practical experience contributing to CI/CD pipelines and managing Gradle build configuration • Solid understanding of modern Android architecture and the ability to make sound decisions across it without being hand-held • Active use of AI tools in your development workflow — not occasionally, but as a real part of how you work • (Plus) Experience integrating payments on Android • (Plus) Experience with WebSockets, gRPC, or other real-time data patterns on mobile • (Plus) Familiarity with cross-platform shared-code architectures • (Plus) iOS or Swift experience • (Plus) Background at a larger, more mature engineering organization where you saw practices evolve as the company grew 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.