Senior Android Engineer — Performance & Stability (Equity)

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

Job summary

Duolingo is seeking an Android engineer on the Application Stability and Performance team to own the stability and performance of the Android Learning app for millions of learners.

You will lead architectural initiatives, own performance tooling with tracing and automated regression detection, and serve as a bridge between Client Platform and Product teams, while mentoring engineers and driving engineering excellence.

Qualifications

• Shipped large scale Android applications.
• Experience identifying root cause and resolving ANRs, memory leaks, dropped frames, and complex crashes.
• Strong Kotlin skills with coroutines, Jetpack Compose, and modern architecture patterns.
• Experience optimizing startup time, memory, and network usage for low-memory devices.

Responsibilities

• Lead architectural initiatives to fix the slowest parts of the app, from startup to critical learning flows.
• Own and evolve our performance tooling with tracing, benchmarking, and automated regression detection.
• Serve as a bridge between Client Platform and Product feature teams, helping them understand and act on the performance data we provide.
• Foster a culture of engineering excellence around performance and mentor engineers of all experience levels.

Skills

Kotlin

Coroutines

Jetpack Compose

Modern architectures

Tools

AndroidX Tracing Library

Perfetto

Sentry

Android Vitals

Job description

Duolingo is seeking an Android engineer on the Application Stability and Performance team to own the stability and performance of the Android Learning app for millions of learners.

You will lead architectural initiatives, own performance tooling with tracing and automated regression detection, and serve as a bridge between Client Platform and Product teams, while mentoring engineers and driving engineering excellence.