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      Klaviyo

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      Software Engineer II Interview

      7 Oct 2023
      Anonymous employee
      Accepted offer
      Positive experience
      Average interview

      Application

      The process took 3 weeks. I interviewed at Klaviyo

      Interview

      I thought this was one of the best/ most innovative interview processes that I’ve seen for a software engineer position. The process was an HR interview, then a “hiring manager” interview (though mine was just with a senior engineer), then a pair programming challenge, then the final round panel. The first two interviews ask you the standard questions that you should already be anticipating. The pair programming round is unique, and does a much better job, I believe, at showing off industry software engineering than leetcode would. For this interview, you’re given code already, and need to figure out what’s going on, and make changes that you see fit, given a new business requirement. The final round panel for me consisted of 2 technical interviews, then 2 with managers. Mine were spread out over two days. The first technical one was similar to the pair programming one where you get some starter code, but then you need to implement all the business requirements. You’ll need to figure out how the libraries provided (likely unknown to you) work and operate (googling is allowed), and then satisfy all the business requirements. Using real stuff many/most full stack engineers do on the job. The second technical interview was more leetcode style, but is still a Klaviyo-made question (I think). I’d probably classify it as a medium leetcode, but on the easier side of mediums. I’m not the greatest at leetcode, but finished it in about 25-30 min. The interviewers for all the technical interviews are there to help too. They were super nice and answered technical questions I had mid-interview. The last two interviews were with the actual hiring manager of the team, and then that manager’s director. Typical questions that you’d expect from both. Throughout the whole process, HR was amazing. They were incredibly prompt with the interviews, both with the scheduling and providing the results. And they gave plenty of prep material so that you have a solid understanding of what to expect from each individual interview. In my opinion, this interview process should be the gold standard for software engineer interviews going forward.

      Interview questions [1]

      Question 1

      Cannot disclose due to NDA
      Answer question

      Other Software Engineer II interview reviews for Klaviyo

      Software Engineer II Interview

      9 Apr 2026
      Anonymous interview candidate
      No offer
      Neutral experience
      Average interview

      Application

      I interviewed at Klaviyo

      Interview

      HR Call, async tech screen, hiring manager convo, virtual onsite. Mostly a fair process that was pretty practical. The team was generally very nice. You have to get a certain distance in the technical screen on the onsite stage to get an offer.

      Software Engineer II Interview

      14 May 2026
      Anonymous interview candidate
      Boston, MA
      No offer
      Neutral experience
      Average interview

      Application

      I applied online. I interviewed at Klaviyo (Boston, MA) in Apr 2026

      Interview

      Applied on LinkedIn. Recruiter reached out via email/candidate portal. Recruiter call was easy/straightforward. They were able to accommodate an accelerated timeline so OA followed quickly after via CodeSignal. Didn't pass but was told there were at least 2 more rounds after the OA.

      Interview questions [1]

      Question 1

      How do you feel about AI?
      Answer question

      Software Engineer II Interview

      8 Dec 2024
      Anonymous interview candidate
      Boston, MA
      No offer
      Neutral experience
      Average interview

      Application

      I applied online. The process took 4 weeks. I interviewed at Klaviyo (Boston, MA) in Sept 2024

      Interview

      Received an email for a phone screen less than a week after applying. After screening, they sent a link for a CodeSignal technical assessment which wasn't too bad. Consisted of 3 parts, each iterating over the previous implementation. Really enjoyed it as it was more practical than the usual leetcode style problems. A day or two later, was a system design interview. I felt like I over-prepared but essentially I was explaining in detail a feature I implemented in my previous role. Final step was a 3 hours final round interview. First part was a simple Weather App assignment with an obscure library to test how you problem-solve and look up documentation. I definitely did not performed as well as I could here as I was stuck up on the obscure library. Second part dealt with an existing Python/SQL script, which we had to review, optimize, and spot any mistakes or security concerns. Finally it ends with an interview with the hiring manager which I can't recall at the moment. Overall it was a positive experience, only reason I put neutral is because I don't believe they are upfront about hybrid, it sounded like they will transition to full on-site soon. 1. Initial phone screening. 2. Code Signal assessment 3. System Design interview. 4. 3 hours final round interview (Weather App, Python/SQL, Hiring Manager)

      Interview questions [3]

      Question 1

      Be prepared to have to go through documentation on an obscure library live (ie PonyORM)
      Answer question

      Question 2

      Be able to troubleshoot and modify/optimize code
      Answer question

      Question 3

      Explain a difficult project, system design-wise
      Answer question

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