Duolingo Interview Questions and Guide
Product engineering backed by heavy experimentation, gamification systems, and clean, readable code.
The Duolingo interview loop
- Recruiter screen
- Technical phone screen
- Onsite: coding, system design, and behavioral
Duolingo interview questions
- Design a News Feed
- Design Instagram
- Longest Substring Without Repeating Characters
- Is Subsequence
- Bus Routes
- Top K Frequent Elements
- Design A Leaderboard
- Reconstruct Itinerary
- Fibonacci Number
- Word Search II
- Multiply Strings
- Design a Music Player
- Tell me about a project you drove from idea to launch
- Tell me about a time you had to change direction mid-project