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      Duolingo

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      SWE Intern Interview

      14 Oct 2025
      Anonymous interview candidate
      Pittsburgh, PA
      No offer
      Negative experience
      Difficult interview

      Application

      I applied online. I interviewed at Duolingo (Pittsburgh, PA)

      Interview

      They outsourced interview to Karat, 3 easy technical runtime/logic erros in code questions and then 1 medium to hard LC. Interviewer doesnt help at all and just stares at you

      Interview questions [1]

      Question 1

      What is the runtime of these two algos and which is faster? When might one be faster than the other?
      Answer question

      Other SWE Intern interview reviews for Duolingo

      SWE Intern Interview

      20 Oct 2024
      Anonymous interview candidate
      No offer
      Neutral experience
      Average interview

      Application

      I interviewed at Duolingo

      Interview

      First part of the process was a codesignal assessment; the next part was a virtual interview done through Karat: there were questions about time and space complexity and then a coding question

      Interview questions [1]

      Question 1

      questions about time/space complexity for some code
      Answer question
      1

      SWE Intern Interview

      1 Oct 2024
      Anonymous interview candidate
      No offer
      Neutral experience
      Average interview

      Application

      I interviewed at Duolingo

      Interview

      They respond pretty fast and the recruiter keeps you updated throughout the process. OA is just a basic CodeSignal, then a Karat which can vary but usually asks one LC-style problem plus time complexity questions.

      Interview questions [1]

      Question 1

      LC Medium and dynamic programming.
      Answer question
      1

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