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      Duolingo

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      Software Engineer(Internship) Interview

      17 Oct 2020
      Anonymous interview candidate
      No offer
      Negative experience
      Difficult interview

      Application

      I interviewed at Duolingo in Oct 2020

      Interview

      Hackerrank followed by two technical interviews with full-time engineers. Technical interviews were much easier than the Hackerrank questions. I completed the entire process (first-round and final round) only to be ghosted.

      Interview questions [1]

      Question 1

      Q: Data structures and algos, backtracking, graphs
      2 Answers
      2

      Other Software Engineer(Internship) interview reviews for Duolingo

      Software Engineer(Internship) Interview

      14 Nov 2025
      Anonymous employee
      Pittsburgh, PA
      Accepted offer
      Positive experience
      Average interview

      Application

      I applied online. The process took 4 weeks. I interviewed at Duolingo (Pittsburgh, PA) in Oct 2025

      Interview

      Consisted of a CodeSignal OA (you can share previous scores). Then, a one-hour technical interview through Karat. Question difficulty was a medium. Second technical interview was with a Duolingo SWE and the question level was a medium-hard.

      Interview questions [1]

      Question 1

      They asked me a medium question involving DFS with a few additional constraints
      Answer question

      Software Engineer(Internship) Interview

      17 Sept 2024
      Anonymous employee
      Pittsburgh, PA
      Accepted offer
      Positive experience
      Average interview

      Application

      I applied online. The process took 3 weeks. I interviewed at Duolingo (Pittsburgh, PA) in Sept 2024

      Interview

      codesignal gca oa (used past score, 600/600) -> karat outsourced interview, 1 hour, 10 minutes of trivial short answer questions about time complexity and the bug and explaining what code does, 50 min hard implementation problem with hashmaps -> batch day final round, 60 minute technical with writing/explaining test cases for a leetcode style problem, solving it, then follow up questions including some oop follow ups (finished in 30 min, talked with interviewers about duolingo for 30 min), 15 minute behavioral with batch day buddy -> call to offer two days later overall a very good process, enjoyed my interviews

      Interview questions [1]

      Question 1

      tell me about yourself and why duolingo
      Answer question
      4

      Software Engineer(Internship) Interview

      30 Jan 2024
      Anonymous interview candidate
      No offer
      Positive experience
      Average interview

      Application

      I interviewed at Duolingo

      Interview

      Technical part was leetcode medium. Did not hear back after that, even though I did pretty well on the technical part. They took about a month or so to give updates, and I did not get any email or info about anything except the rejection

      Interview questions [1]

      Question 1

      Talk about stuff on my resume
      Answer question

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