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      Senior Software Engineer Interview

      21 Jan 2019
      Anonymous interview candidate
      New York, NY
      No offer
      Negative experience
      Easy interview

      Application

      I applied online. The process took 2 months. I interviewed at MongoDB (New York, NY)

      Interview

      Had some phone conversations and then a technical screen from a potential team member. Came on site for a round of interviews, I think five in total, and had lunch there. It was specifically mentioned that they don't do exploding offers because they believe they are the wrong thing to do. So that got them some points on doing the right thing. But then every time I could be cut off in discussion I was, so that they could take control of the situation and control the discussion about compensation. It wasn't really a discussion at that point and seemed like a berating of sorts. My opinion is that taking some moral high ground relative to your competitors (via not doing exploding offers, etc) is not worth anything if the psychological control is just moved to some other part of the process. Negotiations involve two sides, let people talk and express themselves and see if you can reach an accord. My advice for future interviewees: don't mention anything about compensation in verbal communication, tell them this is a big part of a big decision and, since it will all be in writing anyway, you want to do this part via email. Just to make sure you collect your thoughts properly and everyone is happy at the end. If they can't deal, walk. Because of this behavior, I short circuited the process after the on site. The individual people I interviewed with seemed great. Some senior people seemed a little full of themself in some smarmy, weird, laid back kind of way.

      Interview questions [1]

      Question 1

      Implement a JSON encoder.
      Answer question
      7

      Other Senior Software Engineer interview reviews for MongoDB

      Senior Software Engineer Interview

      18 Mar 2026
      Anonymous interview candidate
      No offer
      Negative experience
      Average interview

      Application

      I interviewed at MongoDB

      Interview

      Interviewer had a particular solution in mind that took a different approach from my own. My solution was algorithmically correct but not one that they were familiar with and preferred a non-closed form solution.

      Interview questions [1]

      Question 1

      API design question with some standard library usage required.
      Answer question

      Senior Software Engineer Interview

      8 Jan 2026
      Anonymous employee
      Accepted offer
      Positive experience
      Difficult interview

      Application

      I applied through a recruiter. I interviewed at MongoDB

      Interview

      Process was: Recruiter screening, Phone Screen, 5 Virtual Onsite. The whole process took a long time. I loved each interviewer, they were really friendly, nice and passionate with their work. The interview questions were unique and on the harder side but well organized.

      Interview questions [1]

      Question 1

      Tell me about your biggest achievement
      Answer question

      Senior Software Engineer Interview

      24 Oct 2025
      Anonymous interview candidate
      No offer
      Positive experience
      Difficult interview

      Application

      I applied online. The process took 3 weeks. I interviewed at MongoDB in Oct 2025

      Interview

      Recruiter phone interview, a technical screen, then multiple technical interview rounds. I've gone through non-concurrent programming, concurrent programming, algorithms and the design one; didn't make it to the behaviorial and final interviews, The process is well explained, and I have even got feedback afterwards.

      Interview questions [2]

      Question 1

      Concurrent interview: design a concurrent expriring queue
      Answer question

      Question 2

      Algorithms: K-sum (given an array of numbers, a target sum, and K, find K elements of array that sum up to target)
      Answer question

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