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 world's most popular learning app. Beyond our core learning product, we also offer English proficiency testing with the Duolingo English Test, and are bringing new subjects into the Duolingo app, where people can develop their Math and Music skills.

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!

Read about the technical problems our Engineers work on 

Duolingo Stories has been successful in adding a new, engaging learning experience. We believe they can achieve even greater success by making them more immersive and interactive. Our goal is to create an innovative experience for users to read stories, leveraging their feedback to continuously improve the quality of our content.

We are seeking an iOS engineer to help us develop this new user experience within the Duolingo app. As an iOS engineer, you will be responsible for leveraging our machine-learning algorithms to recommend stories based on user signals and building a dedicated experience for stories in the app.

Why This Matters

• Enhance User Engagement: By delivering more compelling content, we aim to significantly boost user engagement.
• Innovate with AI: Develop a zero-to-one feature using generative AI that provides a new, captivating experience within our app.
• Drive Metrics: Gain insights into driving in-app purchase and engagement metrics improvements.

What You'll Learn

• Building a cutting-edge feature from scratch using generative AI.
• Implementing and refining an In-App Purchase (IAP) system.
• Leveraging user feedback and analytics to improve content quality.
• Collaborating with cross-functional teams to integrate the Stories feature seamlessly into the Duolingo app.

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...

• 5 years of programming experience in Swift
• 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

We invest in and support our Duos! This role is eligible for a robust compensation package of base salary, equity, and Duolingo’s world-class benefits. The starting base salary range for this role is, $148,800 - $274,600. Actual salary may vary based on level, work experience, performance, and other factors evaluated during the hiring process.

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 your recruiter.

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

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.

By applying for this position your data will be processed as per the Duolingo Applicant Privacy Notice.