About the RolePolymarket 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
