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      Twilio

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      Senior Software Engineer Interview

      Jun 24, 2026
      Anonymous interview candidate
      Dublin, Dublin
      No offer
      Positive experience
      Average interview

      Application

      I applied through a recruiter. I interviewed at Twilio (Dublin, Dublin)

      Interview

      At least 4 round 1st round - recruiter screen 2nd round - call with hiring manager behavioural questions and questions about experience 3rd round - technical assessment HackerRank involved concurrency

      Interview questions [1]

      Question 1

      Asked about Incident Management, describe a system you worked on. technical assessment involved concurrency
      Answer question

      Other Senior Software Engineer interview reviews for Twilio

      Senior Software Engineer Interview

      Aug 21, 2025
      Anonymous employee
      Accepted offer
      Positive experience
      Easy interview

      Application

      I applied online. I interviewed at Twilio

      Interview

      Three-stage process: recruiter screening, a test task and on-site interview. Both test task and the on-site were simple and straightforward, with focus on practical skills. On-site included the prospective team lead, VP and a team lead from another team in the same location.

      Interview questions [1]

      Question 1

      - What data structure would you use for variable-length phone number prefixes?
      Answer question

      Senior Software Engineer Interview

      Feb 14, 2025
      Anonymous interview candidate
      No offer
      Negative experience
      Average interview

      Application

      I applied online. I interviewed at Twilio in Jan 2025

      Interview

      Interviewed for the L2 role on the Channels team. I did the online assessment (~3 hours), passed it, then was notified saying they filled the role and were no longer considering me. No referral to another role either. Long story short, don't let this awful company waste your time. 2 algo problems (listed below), 1 easy SQL problem, 1 easy API data retrieval problem, and 2 trivial multiple choice problems.

      Interview questions [2]

      Question 1

      Similar to LC1664 - Ways to Make a Fair Array except you don't need to count the number of ways to make it fair, you just have to find the 1 index to remove to make it fair.
      Answer question

      Question 2

      If you google Hackerrank Approximate Matching you can find some material on it. Involves calculating a text score for substrings of a word based on a given prefix and suffix.
      Answer question
      2