Senior/Software Engineer II, Android

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.

---

About the Role...

We are hiring for Android Engineers at various levels, and below you can find more information about the teams we're hiring for:

Math Progress:

The Math Progress team builds the experiences that connect Duolingo's math lessons into a cohesive learning journey. We help learners find the right content by improving how they navigate topics, grades, and the course path, and we make their learning progress visible through mastery signals, scored reviews, and personalized practice. The team works cross-functionally and experiments rapidly to help learners build momentum and continually strengthen their math skills.

Long-Form Learning:

The Long-form Experience team owns Stories and DuoRadio, Duolingo’s immersive reading and listening experiences that help learners understand real-world conversations. You’ll build engaging, interactive experiences that help learners apply their language skills. We’re also building a brand new long-form session from 0 to 1, and you’ll play a key role in bringing it to Android

🧠 You will...

• Collaborate on software projects with product design and backend aspects
• Develop, release, and maintain native Android application features in Kotlin
• Mentor and set technical direction for junior engineers on the team
  

✅ You have...

• A Bachelor’s degree in Computer Science or a related technical field
• Programming experience in Kotlin on Android
• The ability to communicate technical issues effectively to technical and non-technical stakeholders

⭐ Exceptional candidates will have...

• Strong programming experience building reactive Android apps
• Demonstrated self-direction, with a desire both to learn new techniques and mentor others
• Experience designing clean and maintainable APIs
• Experience writing unit tests and testable code

---