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

Short Form Area:

As an iOS engineer in the Short Form Area, you'll build features that make up the core of the learning experience on Duolingo. Our short-form lessons are where learners spend the majority of their time on the app, and our area's mission is to make these sessions more effective and engaging. You'll work on adding new exercises that support our learners in practicing skills like recall and production in bite-sized formats, as well as creating other ways to help learners build foundational skills in a new language. We're looking for engineers who are passionate about improving how we teach.

🧠  You will...

• Collaborate on software projects with product design and backend aspects
• Develop, release, and maintain native iOS applications, primarily in Swift
• Mentor and set technical direction for junior engineers across the company

 

✅  You have...

• A Bachelor’s degree in Computer Science or a related technical field
• A solid foundation in computer science with strong competencies in data structures, algorithms, and software design
• Programming experience in Swift

 

⭐  Exceptional candidates will have...

• Strong proficiency in Swift, with proven ability to build and maintain production-level applications
• Strong technical knowledge of iOS mobile application development for iPhone/iPad using Swift with Cocoa Touch and related frameworks
• Experience designing clean and maintainable APIs
• Experience with multithreaded programming
• Experience writing unit tests and testable code
• Knowledge of iOS SDK performance tools and optimization techniques