Senior Android Engineer: Performance & Stability Lead

EngineersOfAI; Pittsburgh (Allegheny County); On-site; USD 183,000 - 247,000; Full time

Job summary

Duolingo seeks an experienced Android engineer for the Application Stability and Performance team to own stability, memory usage, and performance of the Android Learning app used by millions of learners.

You will lead architectural improvements, enhance tracing and benchmarking tooling, and collaborate with Client Platform and Product teams to translate performance data into concrete improvements, while mentoring colleagues across experience levels.

Qualifications

• Shipped large Android applications with strong stability focus.
• Experience identifying root causes of ANRs, memory leaks and crashes.
• Strong Kotlin skills with coroutines, Jetpack Compose, and modern patterns.
• Experience optimizing startup, memory, and network usage on low-memory devices.
• Familiarity with tracing and crash observability tools is a plus.

Responsibilities

• Lead architectural initiatives to fix the slowest parts of the app, from startup to critical learning flows.
• Own and evolve performance tooling with tracing, benchmarking, and automated regression detection.
• Bridge between Client Platform and Product teams to act on performance data.
• Mentor engineers and foster a culture of performance excellence.

Skills

Android development

Kotlin

Coroutines

Jetpack Compose

Performance optimization

Crashes ANRs analysis

Tools

AndroidX Tracing Library

Perfetto

Sentry

Android Vitals

Job description

Duolingo seeks an experienced Android engineer for the Application Stability and Performance team to own stability, memory usage, and performance of the Android Learning app used by millions of learners.

You will lead architectural improvements, enhance tracing and benchmarking tooling, and collaborate with Client Platform and Product teams to translate performance data into concrete improvements, while mentoring colleagues across experience levels.