Mobile Infrastructure Engineer

Polymarket•New York, NY

4d•$250,000 - $350,000

About The Position

Polymarket is looking for a Mobile Infrastructure Engineer to own mobile infrastructure end-to-end: the release pipeline, CI, test infrastructure, stability, and observability that let a small mobile platform team ship a high-traffic trading product quickly and safely. You'll also help build our AI layer — the harnesses, evaluations, and developer tooling that make AI a first-class part of how we build and ship mobile software. This is a generalist, hands-on role. You'll build and operate the tooling behind how the team ships — release automation, CI, test infrastructure, observability — and extend that toolchain with AI. The work spans services and code: alongside the pipelines and dashboards, you'll go into the app itself to fix crash clusters and harden error paths. We're looking for someone who has kept a high-traffic consumer mobile product shipping reliably.

Requirements

Broad mobile infrastructure experience at consumer scale, including CI/CD, release automation, test infrastructure, and stability work on iOS, Android, or both
Hands-on experience with mobile release tooling: crash reporting and monitoring with Sentry or similar, feature flagging with LaunchDarkly or similar, and release automation with fastlane or an equivalent
Practical experience applying AI to engineering work: building evaluation harnesses, integrating LLM-powered features, or embedding AI agents into developer workflows
Measurement-driven approach to quality — you instrument, set budgets, and prove improvements rather than operating on gut feel
Willingness to go into app code when the tooling surfaces problems — you can fix crash clusters and harden error paths yourself while your core ownership stays the tooling and infrastructure around the app
Generalist temperament: comfortable owning the tooling for release, CI, quality, observability, and AI at the same time on a small team, and able to drive each area without heavy oversight

Nice To Haves

Familiarity with real-time data applications, live market feeds, or trading products on mobile
Background in fintech or other data-intensive consumer mobile products

Responsibilities

Own the release tooling across iOS and Android: automated builds, code signing, store submission, phased rollouts, hotfix paths, and post-release health checks after every deployment
Build and maintain CI infrastructure that earns trust: build-time budgets, flaky-test detection and quarantine, merge gates, and device and simulator infrastructure that keeps feedback loops short
Build the quality tooling: regression gates and automated coverage that let the team set and defend crash-free and ANR targets — and go directly into app code to fix crash clusters and harden error paths when the tooling surfaces them
Run the observability stack and alerting that surfaces problems before users feel them
Build AI into the mobile toolchain: create evaluation harnesses for AI-assisted features, embed AI agents into developer workflows, and make AI a first-class part of how the team ships and tests
Measure everything: set budgets, track them over time, and prove improvements with data rather than instinct