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      Senior Frontend Engineer Interview

      28 Oct 2022
      Anonymous interview candidate
      London, England
      No offer
      Positive experience
      Average interview

      Application

      The process took 2 weeks. I interviewed at Marshmallow (London, England) in Oct 2022

      Interview

      I interviewed through a recruiter in October 2022. The first round was with an engineering manager, with questions around my professional history, ways of working, my attitude to technical debt and testing. The interview took around 45 minutes, with around 10-15 minutes of that time being me asking questions. After this there was a take-home test. The instructions said it should take around 4-5 hours, and I spent 5 hours on it. The task was quite straightfoward - fetch an array of data from an API and render it on screen, with functionality to filter/sort each item, and to click an item to reveal more information. 5 hours sounds like a long time for that, but they wanted it to be done in their internal React stack (Redux/RTX/Styled Components) with tests. Tests probably took about half the time for me as I wanted to be thorough. After the take home test there was a technical interview with a lead FE dev and another dev from the team. I was informed that the interview would focus on my technical test and Typescript - there wasn't a single question on Typescript and there was one question on my technical test that, which lasted about a minute! I gave an answer and the interviewer was happy so moved on. The other questions were focussed on React, investigating web performance issues, testing, ways of working, my background. A lot of ground that was covered on the first interview. I didn't make it past this stage as the interviewer felt I didn't dive deep enough into the technical aspect of my answers after prompting. I remember the questions and still can't work out what it was they were after!

      Interview questions [4]

      Question 1

      How would you investigate performance issues?
      1 Answer

      Question 2

      How would you explain useEffect to a junior dev?
      Answer question

      Question 3

      Do you disagree with people at work?
      Answer question

      Question 4

      Could you explain the testing pyramid?
      Answer question