# Lead Mobile Engineer, Performance

**Company:** [Polymarket](https://hotfix.jobs/companies/polymarket)
**Location:** New York, NY
**Role:** Mobile Engineering
**Experience:** 5+ years
**Skills:** Swift, Kotlin, iOS, Android, memory management, rendering, network optimization, background processing, real user monitoring, crash reporting, frame rate profiling, Caching, synthetic testing, real-time data
**Posted:** 2026-08-11

> Leads mobile performance engineering across iOS and Android, owning startup, rendering, runtime efficiency, networking, caching, and observability. The role requires deep large-scale mobile expertise, Swift and/or Kotlin proficiency, rigorous profiling, and technical leadership.

## Job Description

## Responsibilities
- Own mobile performance end-to-end, including startup time, rendering performance, and runtime efficiency across the mobile platform.
- Define architecture, standards, and tooling for mobile performance, including memory management, rendering pipelines, network efficiency, and background processing.
- Identify and eliminate bottlenecks in app startup, screen transitions, real-time data rendering, and network request handling across iOS and Android.
- Design data-fetching, caching, and synchronization architectures that minimize latency and maintain responsiveness under varying network conditions.
- Build performance observability through real-user monitoring, crash reporting, frame-rate tracking, and synthetic testing.
- Establish benchmarks, performance budgets, and engineering standards to prevent regressions.

## Requirements
- Deep experience in mobile performance engineering at significant scale across iOS, Android, or both.
- Strong expertise in rendering, memory management, network optimization, background processing, and app startup.
- Proficiency in Swift and/or Kotlin, with an understanding of mobile runtimes, rendering systems, and operating-system scheduling.
- Experience with real-user monitoring, frame-rate profiling, and observability systems.
- Measurement-driven approach using profiling, instrumentation, and performance validation.
- Technical leadership experience setting direction and influencing broader engineering practices.

## Nice-to-haves
- Familiarity with real-time data applications, live market feeds, or mobile trading products.
- Background in fintech or data-intensive consumer mobile products.

## Compensation & Benefits
- Competitive salary and equity.
- Unlimited paid time off.
- Full health, vision, and dental coverage.
- 401(k) match.
- Hardware setup including a new MacBook Pro, large display, and accessories.

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