Our mission at Duolingo is to develop the best education in the world and make it universally available. But we’ve got more left to do — and that’s where you come in!

Duolingo is the world's most popular learning app. Beyond our core learning product, we also offer English proficiency testing with the Duolingo English Test, and are bringing new subjects into the Duolingo app, where people can develop their Math and Music skills.

We are passionate about educating our users, making fact-based decisions, and finding innovative solutions to complex problems. We offer meaningful work, limitless learning opportunities, and collaboration with world-class minds. Come brighten your life and over half a billion more!

About the role...

As an engineer on the Client Builds and Infrastructure team you’ll be responsible for evaluating and setting the direction for our Android builds. This includes centralizing build logic, working on modularization strategies, and optimizing build times across 50+ Android developers.

Read about the technical problems our Engineers work on.

  You Will...

• Collaborate with our CI/CD team to proactively maintain and improve test, build, and release pipelines
• Provide input on core app architectural decisions and drive implementation
• Foster a culture of engineering excellence and mentor engineers of all experience levels
• Create tools and libraries that provide a foundation for the Duolingo Learning Android app
• Design, develop, and maintain automated testing frameworks and scripts
• Stay up-to-date on industry trends and emerging technologies, to continually enhance testing strategies and tools

You Have...

• 6+ years of Android software engineering experience, and 1-2+ years developing scalable production software and an excellent command of engineering fundamentals
• Experience supporting either Gradle-based projects or large Android builds
• Significant experience with build automation
• Proven ability to drive large-scale technical initiatives across multiple teams
• Proficiency in Android development using standard tools and frameworks

Preferred Candidates Will Have...

• Expertise in Kotlin
• Knowledge of Android SDK performance tools and optimization techniques
• Experience with Gradle principles e.g., caching and task avoidance
• Deep understanding of unit testing and test automation

We will do everything we can within reason to make sure that your interview takes place in an environment that fairly and accurately assesses your skills. If you need assistance or accommodation, please contact [email protected].

Take a peek at how we care for our employees' holistic well-being with our benefits here.

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.

By applying for this position your data will be processed as per the Duolingo Applicant Privacy Notice.