Senior Android Engineer

Polymarket; New York, Northern (NY, KY); Hybrid; USD 140,000 - 210,000; Full time

Benefits offered by this job

Competitive salary & equity

Unlimited PTO

Health, Vision, Dental coverage

401k match

MacBook Pro setup

Job summary

Polymarket is hiring a Senior Android Engineer to build a world-class Android trading app used by millions. You will own features across payments, real-time market data, and core UI, delivering fast, reliable experiences in a high-velocity environment.

The role emphasizes performance, real-time challenges, and thoughtful architecture. You’ll work with a distributed team, leverage AI tools, and contribute to scalable Android engineering practices.

Qualifications

• Proficient in Kotlin with strong tradeoff reasoning.
• Experience building UI with Jetpack Compose in production apps.
• Experience contributing to CI/CD pipelines and Gradle configuration.
• Solid understanding of modern Android architecture and decision-making without hand-holding.
• Active use of AI tools in development workflows.
• Plus: Payments integration on Android.
• Plus: Real-time data patterns with WebSockets/gRPC.
• Plus: Cross-platform shared-code architectures.
• Plus: iOS/Swift experience.
• Plus: Experience in large, mature engineering organizations.

Responsibilities

• Build and own Android features spanning payments flows, real-time data, and core UI with end-to-end ownership.
• Implement polished, performant interfaces with Jetpack Compose for high-speed trading environments.
• Contribute to CI/CD pipelines and Gradle configuration for smooth shipping.
• Build and maintain integrations across WebSockets, gRPC, and streaming data for live markets.
• Collaborate effectively with a distributed team across time zones.
• Incorporate AI tools into your development workflow to move faster while maintaining output quality.
• Identify architectural gaps early to prevent scale-related issues.

Skills

Kotlin

Jetpack Compose

CI/CD

Android architecture

AI tooling

Payments

WebSockets

gRPC

Cross-platform

iOS Swift

Large org exp

Tools

Gradle

CI/CD tooling

WebSockets

gRPC

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