Senior Android Engineer, Client Platform - Application Stability and Performance
Duolingo · NY, US
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About the Role
As an Android engineer on our Application Stability and Performance team, you will own the stability and performance of the Duolingo Android Learning app for millions of learners. This team builds essential tooling for other engineers, focusing on AI agent-driven crash and memory analysis, coroutine system tracing, and Macrobenchmark suites to prevent regressions. You will also manage performance metrics for experiment analyses and ensure hundreds of concurrent experiments do not surface performance issues.
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
Requirements
- Worked on and shipped large scale Android applications
- Experience identifying the root cause 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
- Expertise in Android tracing tooling like the AndroidX Tracing Library and Perfetto
- Experience with crash observability tooling like Sentry and Android Vitals
Skills
- Kotlin
- Coroutines
- Jetpack Compose
- Android tracing tooling
- Crash observability tooling
Salary/Compensations
- $182,800—$247,300 USD
Benefits
- Equity compensation
- Benefits for holistic well-being
About the Company
- Duolingo's mission is to develop the best education in the world and make it universally available.
- At Duolingo, you’ll join a team that cares about finding innovative solutions to complex technical problems, running countless experiments (300+ at a time!) with our massive user base to make data-driven decisions, and educating our users and employees alike.
- You’ll have limitless learning opportunities, mentorship and collaboration with world-class minds, and a variety of projects with large scopes — while doing work that’s both fun and meaningful.
- Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world.
Equal Opportunity
- Duolingo is proud to be an Equal Employment Opportunity employer.
- We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.