Software Engineer II, Backend
Duolingo(1 month ago)
About this role
The Test Scoring team at Duolingo builds the administration and scoring algorithms behind the Duolingo English Test, partnering with AI researchers and psychometricians to maintain accurate, reliable scoring. This role focuses on developing, releasing, and maintaining backend services and infrastructure, while driving individual project priorities and cross-functional collaboration. The team emphasizes data-driven experimentation at scale and building robust guardrails for product integrity.
Required Skills
- Backend Development
- Infrastructure
- Project Leadership
- Collaboration
- Java
- Python
- Kotlin
- Databases
- Data Structures
- Algorithms
+3 more
Qualifications
- BS in Computer Science
About Duolingo
duolingo.comDuolingo is a popular language-learning platform that offers free, gamified lessons on web and mobile for dozens of languages. It uses short interactive exercises, spaced-repetition and data-driven personalization to build reading, writing, speaking and listening skills, and also provides complementary products like Duolingo for Schools, Duolingo ABC for kids, Stories/Podcasts, and the Duolingo English Test. The core service is ad-supported and free, with an optional Duolingo Plus subscription for an ad-free experience, offline access, and extra features; millions of learners worldwide use it for its engaging, science-backed, bite-sized approach.