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      Sr. Software Engineer Interview

      Aug 27, 2025
      Anonymous Interview Candidate
      Seattle, WA
      No offer
      Negative experience
      Average interview

      Application

      I applied online. The process took 4 weeks. I interviewed at Slack (Seattle, WA) in Aug 2025

      Interview

      The worst interview experience I ever had. The recruiter reached out to me for this position and after recruiter call, I had one Hiring manager call and I had to follow up couple of days later and was responded in a minute about next steps i.e. Take home Code Review. The take home assignment is a complete waste of your time, they allow you 24 hours and even if you followed all good code review practices, you have no idea about the interviewer is expecting. Then comes the most frustrating part, until this time the recruiter was very responsive and providing detailed answers for queries but after this round, no response even after I had followed up twice. I was ghosted without even a result. At least in normal interviews you can get a sense of whether interviewer was happy with you. Giving take home test and wasting 3-4 hours on their buggy code is useless.

      Interview questions [1]

      Question 1

      How would you debug if a service starts delaying responses suddenly.
      Answer question

      Other Sr. Software Engineer Interview Reviews for Slack

      Senior Software Engineer Interview

      Sep 9, 2025
      Anonymous Interview Candidate
      No offer
      Negative experience
      Average interview

      Application

      I applied through an employee referral. The process took 3 weeks. I interviewed at Slack in Aug 2025

      Interview

      Long interview process. Recruiter screen, manager screen, code review take home (I spent 1.5 hours). Then a final loop with system design, coding (1.5 hours), and 2 behaviorals. The managers I talked to were great, but none of the engineers seemed engaged at all or like they wanted to be there. After the final loop (which I thought went well) I was ghosted by the recruiter, he didn't even respond after I followed up a couple times asking for status. It's unacceptable to not even get a generic rejection email considering all the time I put into this interview process. Complete waste of time.

      Interview questions [1]

      Question 1

      Coding - download real codebase with a Slack-like chat app using Sqlite DB. Had a list of prompts to add a feature (private channels) System design - Design system to injest commands/keywords given in Slack messages, call 3rd party APIs based on them Behavioral - mostly standard questions, also asked some vague open ended technical questions like "how would you think about the API for user search suggestions in Slack"
      Answer question

      Senior Software Engineer Interview

      Nov 11, 2025
      Anonymous Interview Candidate
      Atlanta, GA
      No offer
      Positive experience
      Difficult interview

      Application

      I applied through a recruiter. The process took 4 weeks. I interviewed at Slack (Atlanta, GA) in Nov 2024

      Interview

      First Round: Recruiter Screening Second Round: Chat with Staff Engineer Third Round: Technical Challenge; build a mini-app Fourth Round: 4 separate interviews with the team, 2 of which were system design

      Interview questions [1]

      Question 1

      How would I design a mapping system?
      Answer question

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