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      Mercor

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      Data Engineer Interview

      Mar 31, 2026
      Anonymous interview candidate
      San Francisco, CA
      No offer
      Neutral experience
      Average interview

      Application

      I interviewed at Mercor (San Francisco, CA)

      Interview

      Take home coding you gotta make a small project pretty easy. Then you do a call with senior ds asks pretty basic questions.then onsite 5 questions full day from 12-6 all technical

      Other Data Engineer interview reviews for Mercor

      Data Engineer Interview

      Mar 7, 2026
      Anonymous interview candidate
      San Francisco, CA
      No offer
      Positive experience
      Average interview

      Application

      I interviewed at Mercor (San Francisco, CA)

      Interview

      Applied on website #### Round 1: AI interview - Asked about me - Asked to design URL shortener, I explained - Asked how you will handle deletions in it #### Round 2: Take home assignment #### Round 3: Took this round for all of the people at once, told to optimize the code for throughput In last asked how was the interview process, All people praised, I yelled at them that it's not nice #### Round 4: Given an object structure that data is present in S3 we need to ingest it into a database and optimize the search calculation: - 12kB per candidate - 1024 embeddings - 4kb (total - 4bytes * 1024) - 500 million candidates Some questions: 1. which is costly storing in ram or querying ? ram is cheap then how can we effectively get it ? 2. how can we get distributed search from Turbopuffer ? 3. how do we shard the database ? Sharding won't help in searching 4. Retrieving from S3 is not that simple, network crash, worker crash all kinds of stuff happens ? 5. how can i get data from the continents like Asia if i had only shard via country ? Verdict: Haven't responded, Take it as Rejected

      Interview questions [1]

      Question 1

      at last they asked me experience in previous company and there is a team in the company which is kind of near to my prev work so he told he will forward my resume to them
      Answer question

      Data Engineer Interview

      Jun 2, 2026
      Anonymous interview candidate
      No offer
      Negative experience
      Average interview

      Application

      I interviewed at Mercor in Mar 2026

      Interview

      It was an AI interview. the questions were good and the AI goes deep questions based on your answer. the only thing i disliked about it was that the AI sometimes cut you in the middle while you're answering

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