Software Engineer, Intern

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 most popular language-learning application in the world, with over 500 million users and over half a billion exercises completed daily. Beyond our core language learning product, we have also entered into English proficiency testing with the Duolingo English Test, and introduced new courses for Music and Math. 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! What you’ll do... Collaborate on full-stack software projects in collaboration with product design Develop, release, and maintain services and/or infrastructure Lead individual project priorities, deadlines, and deliverables Past Projects include: Developing a GPT-4 chat interface for one of our internal tools to streamline content creation Spanish audio lessons, to improve listening comprehension Crafting new lessons to teach Coordinates in our Math course Integrating our A/B testing framework with our observability stack to flag experiments that introduce errors Adding pinyin to the Chinese course Porting large features to new platforms (iOS, Android, web) Filtering out bad ads Dashboards and tooling for site reliability insights Crafting new microservices from scratch What we’re looking for… Graduating in Spring 2026, or sooner Pursuing a B.S. or M.S. degree in Computer Science or related technical field (i.e. math, physics or data science) Dedication to our mission of universally available education 12 weeks of consecutive availability Ability to relocate to Pittsburgh, PA 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 Why you’ll love working here… Language learning opportunities Catered in-house lunches, and breakfast and dinner options Company-wide Hackathon PTO and company holidays Frequent company-wide dinners, monthly celebrations, social clubs, and so much more!