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      Data Scientist Interview

      5 Jun 2026
      Anonymous employee
      Accepted offer
      Positive experience
      Difficult interview

      Application

      I interviewed at TikTok

      Interview

      Took about six weeks from start to offer, longer than I anticipated. The process involved a technical phone screen followed by two rigorous coding rounds and a final onsite interview. I tackled questions on defining success metrics and detecting suspicious transactions, along with writing pseudocode for self-attention and cross-entropy. Halfway through the coding round, I realized that the problem I was working on was straight from a PracHub prep session just days earlier. Overall, it was a challenging yet rewarding experience, and I’m excited to join the team.

      Interview questions [3]

      Question 1

      Define success metrics for a new product and detect suspicious transactions
      Answer question

      Question 2

      Write self-attention and cross-entropy pseudocode
      Answer question

      Question 3

      Find high-value users and the top-CTR product from a logs table
      Answer question

      Other Data Scientist interview reviews for TikTok

      Data Scientist Interview

      29 May 2026
      Anonymous interview candidate
      London, England
      No offer
      Neutral experience
      Difficult interview

      Application

      I applied online. I interviewed at TikTok (London, England)

      Interview

      one medium level sql test and an open question Since i'm not familiar with business context(though i actually spent time preparing AB test and causal inference), i didn't get what i should answer.

      Interview questions [1]

      Question 1

      if tiktok shop is going to launch in Netherland, how to evaluate it before AB test
      Answer question

      Data Scientist Interview

      11 Apr 2026
      Anonymous interview candidate
      Declined offer
      Neutral experience
      Average interview

      Application

      I interviewed at TikTok

      Interview

      There was a recruiter screen. After the screen, I did a sql coding exercise. Afterwards, I had a statistical interview. The last round was how I would run and design an experiment.

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