Staff Android Engineer

About the role

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 Staff 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, high-influence role for someone who has operated at the staff level before and knows what it means to shape a platform, not just build on it. You'll set the technical direction for Android at Polymarket, raise the bar across the codebase, and help take a product that's already at scale to the next level. WHAT YOU'LL DO - Set the technical direction for Android at Polymarket, making and owning architectural decisions that the team builds around - 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 - Own CI/CD pipelines and Gradle configuration, keeping the build fast and the release process reliable as the team and product grow - Build and maintain integrations across WebSockets, gRPC, and streaming data to power the live market features traders depend on - Operate as a technical leader across a distributed team: communicate clearly, make decisions without hand-holding, and raise the engineering bar through code reviews and strong engineering standards - Actively incorporate AI tools into your development workflow to move faster and maintain a high output bar - Identify and address gaps in Android architecture and engineering practices before they become problems at scale WHAT WE'RE LOOKING FOR - Significant Android engineering experience, with a track record of owning and shaping Android platforms at scale, not just contributing to them - Strong, current expertise in Kotlin with the ability to speak concretely to tradeoffs and make architectural calls with confidence - Deep experience building production UI with Jetpack Compose and a high bar for performance and polish - Experience owning CI/CD pipelines and Gradle build configuration end-to-end - Solid understanding of modern Android architecture with the judgment to evolve it as the product scales - A track record of technical leadership: you've influenced how an engineering team works, not just what it ships - 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 and shaped practices 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, plus equity and benefits. This is a good-faith range for the level we're hiring at. Experience varies widely within a title here, so if your expectations fall outside it, reach out anyway. We're always happy to talk it through.