Staff Android Engineer

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