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      OneUp Sales

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      Software Developer Interview

      13 Dec 2024
      Anonymous employee
      Accepted offer
      Positive experience
      Average interview

      Application

      I applied through a recruiter. The process took 1 week. I interviewed at OneUp Sales in Feb 2024

      Interview

      Initial screening call on Google meet, then a take home test. Next is a video call again to get feedback on the test, then a culture call with various employees in the company.

      Interview questions [1]

      Question 1

      What is one thing that makes you want to stay at a company?
      Answer question

      Other Software Developer interview reviews for OneUp Sales

      Software Engineer Interview

      3 Feb 2026
      Anonymous interview candidate
      London, England
      No offer
      Negative experience
      Difficult interview

      Application

      I applied online. I interviewed at OneUp Sales (London, England) in Nov 2025

      Interview

      It was a pretty strange process. First, I had a quick screening call. The person was asking scripted questions, showed very little emotion, and there was no real connection at all. Still, the feedback after that call was positive. Then I had a second interview. The way the interview was run felt very similar. It was impossible to break the “official” atmosphere, which, to be honest, is not something I’m used to. Usually my interviews are with people who have a positive attitude and try to create a more relaxed and friendly environment. Here, that was definitely not the case. The interview felt focused purely on asking questions from a script. I was not given a chance to introduce myself, and there were no questions about my previous role or background. The very first question was: “Why should you avoid using the array index as a key when mapping over an array in React?” Honestly, that completely threw me off. I didn’t really know what to say, because I’m not good at answering very specific, theory-focused questions straight from memory under pressure. After the interview, when I had time to think about it calmly, I realised what the question was actually testing. But at the time, it broke my rhythm and the rest of the interview didn’t go the way I wanted. I was asked around five questions in total. This one I remember very clearly. There were also questions about React hooks and what useCallback is used for, but I don’t really remember the rest.

      Interview questions [1]

      Question 1

      Why should you avoid using the index as a key when mapping over an array in React?
      Answer question

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