CodeSignal GCA OA (used past score, 600/600) -> Karat outsourced interview, 1 hour. 10 minutes of trivial short answer questions about time complexity, bugs, and explaining code. 50 minutes for a hard implementation problem with hashmaps. -> Batch Day final round, 60-minute technical interview. Involved writing and explaining test cases for a LeetCode-style problem, solving it, and follow-up questions including some OOP follow-ups (finished in 30 minutes, discussed Duolingo with interviewers for 30 minutes). 15-minute behavioral interview with the Batch Day buddy. -> Call to offer two days later.

Overall, a very good process. Enjoyed my interviews.

Tell me about yourself, and why Duolingo?