Senior Android Engineer, App Builds

Our mission at Duolingo is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in!

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.

As an engineer on the App Builds team in our Client Platform area 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 70+ Android developers.

• Drive the modernization of our CI build and release pipelines with the migration to new Github Action workflows
• Develop tooling and automation to accelerate the modularization of our Kotlin codebase
• Design and evolve Android test infrastructure to improve developer velocity and test reliability
• Proactively identify and implement improvements to our build performance, reliability, and developer workflows as the Android ecosystem evolves
• Foster a culture of engineering excellence and mentor engineers of all experience levels

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

• Expertise working with CI/CD platforms like Github Actions
• Experience with Gradle principles e.g., caching and task avoidance

We post a multi-level salary range for all of our roles.

This is not inclusive of the rest of our awesome portfolio that includes equity compensation and world‑class benefits. Our salary ranges are the same for all US locations. Your recruiter can share more details about the range for a specific level during the hiring process. The actual salary within the range is determined by many factors including but not limited to, skills, experience, education, and internal equity.

Salary Range: $182,800 — $247,300 USD

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

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

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.

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