Software Engineer, Intern

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 educating our users, experimenting with big ideas, making fact-based decisions, and finding innovative solutions to complex problems. You’ll have limitless learning opportunities and daily collaborations with world-class minds — while doing work that’s both meaningful and fun.

Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world.

Read our blog to learn more.

🧠 What you'll do...

• Contribute to full-stack software projects by developing, testing, and maintaining features and services.
• Develop, release, and maintain services and/or infrastructure
• Lead individual project priorities, deadlines, and deliverables
• Contribute to code reviews and collaborate across teams to ensure quality and scalability

✅ What we're looking for...

• Graduating December 2027 - August 2028
• Pursuing a B.S. or M.S. degree in Computer Science or a related technical field (e.g. math, physics or data science)
• Dedication to our mission of universally available education
• Programming experience in one or more of the following languages: Java, Python, Kotlin, or Swift.
• 12 weeks of consecutive availability
• May 24, 2027 - August 13, 2027
• June 14, 2027 - September 3, 2027
• Deadline to apply: September 30, 2026

⭐ What you can expect...

• Close support from your mentor and your team
• Working on features and projects that will have real impact for our learners and internal users
• A fun, mission-driven environment, where you’ll have lots of opportunities to grow as an engineer and make meaningful connections with your colleagues

👀 Past projects include...

• Developing a GPT-4 chat interface for one of our internal tools to streamline content creation
• Integrating our A/B testing framework with our observability stack to flag experiments that introduce errors
• Spanish audio lessons to improve listening comprehension
• Crafting new lessons to teach Coordinates in our Math course
• Porting large features to new platforms (iOS, Android, web)
• Dashboards and tooling for site reliability insights
• Crafting new microservices from scratch

❤️ Past projects include...

• Language learning opportunities
• Catered in-house lunches, and breakf