Duolingo Engineering Blog
We track 11 mobile engineering articles by the Duolingo team, published 2015 to 2026. They cover iOS, Android and Kotlin Multiplatform. Duolingo writes most about Testing, AI and Architecture.
Duolingo is the world's most popular language-learning app, offering gamified lessons in over 40 languages. Their mobile engineering team has been a pioneer in adopting Kotlin Multiplatform and SwiftUI, serving over 100 million monthly active learners worldwide.
Duolingo mobile tech stack & focus areas
Built from the platforms and topics of 11 articles the team published.
- Platforms
- Frequent topics
- Publishing since
- 2015 · latest in 2026
- Official blog
- blog.duolingo.com
Most notable Duolingo articles
One pick for each topic the team covers most.