Senior Android Engineer, Client Platform - Application Stability and Performance
Duolingo · New York, NY
About this role
## Senior Android Engineer — Client Platform (Application Stability & Performance) Duolingo’s mission is to develop the best education in the world and make it universally available. As an Android engineer on the **Application Stability and Performance** team, you’ll own the **stability and performance** of the Duolingo Android Learning app for **millions of learners**. This team builds the tooling other engineers depend on to keep the app performant, including: - **AI agent–driven crash and memory analysis** - **Coroutine system tracing** - **Macrobenchmark suites** to catch regressions before they ship You’ll also own the **performance metrics** that feed into experiment analyses and help ensure that **hundreds of concurrent experiments** surface any performance issues or regressions. --- ### 🧠 You will… - 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** - Serve as a bridge between **Client Platform** and **Product feature teams**, helping them understand and act on performance data - Foster a culture of engineering excellence around performance and mentor engineers across experience levels --- ### ✅ You have… - 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 deep 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 --- ### ⭐ Exceptional candidates will have… - Expertise in Android tracing tooling like **AndroidX Tracing Library** and **Perfetto** - Experience with crash observability tooling like **Sentry** and Android…
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