Senior Android Engineer: App Stability & Performance (Equity)

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

Benefits offered by this job

Equity compensation

Job summary

Duolingo is seeking an Android engineer for 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 to fix slowest parts of the app, evolve performance tooling, and collaborate with Client Platform and Product feature teams while mentoring engineers to sustain engineering excellence.

Qualifications

• Worked on and shipped large scale Android applications.
• Experience identifying root causes and resolving ANRs, memory leaks, dropped frames, and complex crashes.
• Strong Kotlin skills and familiarity with coroutines, Jetpack Compose, and modern architecture patterns.
• Experience optimizing startup time, memory, and network usage for low-memory devices.
• Strong problem-solving skills and a passion for tackling difficult challenges.

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

Android apps

ANRs & crashes

Kotlin

Coroutines

Jetpack Compose

Architecture patterns

Startup optimization

Memory optimization

Network optimization

Problem solving

Tools

AndroidX Tracing Library

Perfetto

Sentry

Android Vitals

Job description

Duolingo is seeking an Android engineer for 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 to fix slowest parts of the app, evolve performance tooling, and collaborate with Client Platform and Product feature teams while mentoring engineers to sustain engineering excellence.