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      Illumina

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      Software Engineer Interview

      12 May 2021
      Anonymous interview candidate
      San Diego, CA
      No offer
      Negative experience
      Difficult interview

      Application

      I applied online. I interviewed at Illumina (San Diego, CA) in Apr 2021

      Interview

      The interview was for a Software Engineer position dealing with test automation. I have 2 years experience. I had a negative experience interviewing with Illumina. I spoke with and exchanged emails with 2 recruiters/HR who were both super professional, friendly, and quick to get back to me. I had a quick phone interview with a manager who was also great, and it got me excited about the company. It took about 2-3 weeks until they set scheduled my next interview. They scheduled a technical interview as well as an interview with the team's manager for the next day which I thought was odd. The technical interview went very poorly, both my fault and the interviewers. One of the interviewers was brand new to the team (1 week) and was still learning. The more senior member seemed to not want to be doing the interview, and I could tell after a few questions they had basically stopped trying and were only killing time. It was honestly a bizarre experience that left me confused and frustrated. It was right after lunch and I think all 3 of us were just not fully in the right mindset for the situation. Another thing I should mention is that the pay they were offering was significantly below the average, especially for SD.

      Interview questions [1]

      Question 1

      The questions they asked me in both interviews were entirely based on definitions/topics you learn in early CS classes, as well as leetcode questions. Nothing hands on or real-world. Examples: - What is overloading, what is a deadlock (first interview) - Create a function the accepts an integer and returns an integer of the first integer's digits reverse, ex. 123 returns 321 (technical interview)
      1 Answer
      5

      Other Software Engineer interview reviews for Illumina

      Software Engineer Interview

      7 Jun 2026
      Anonymous interview candidate
      Singapore
      No offer
      Positive experience
      Average interview

      Application

      I interviewed at Illumina (Singapore)

      Interview

      It starts with HR review, then a video interview. The video interview will start with questions about the resume. Then, they asked a question from Leetcode via Leetcode. It was a two-sum problem.

      Interview questions [1]

      Question 1

      Solve a 2-sum problem. It is the typical 2-sum problem directly from Leetcode.
      Answer question

      Software Engineer Interview

      27 May 2025
      Anonymous interview candidate
      Declined offer
      Positive experience
      Easy interview

      Application

      I interviewed at Illumina

      Interview

      Easy process, very simple phone screen followed by a algo / data structures technical round. I would say to just focus on getting better at leetcode, and to not sweat it too much.

      Interview questions [1]

      Question 1

      Reverse a doubly-linked list in-place.
      Answer question

      Software Engineer Interview

      20 May 2024
      Anonymous employee
      Accepted offer
      Positive experience
      Average interview

      Application

      I interviewed at Illumina

      Interview

      focus on technical, no much behavior question. need to match job description, whole day interview with 5/6 interview panel. lunch provided, and onsite interview. remote allowed but prefer to be onsite

      Interview questions [1]

      Question 1

      any experience with system performance
      Answer question
      2