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      Senior Software Engineer Interview

      29 Jun 2023
      Anonymous interview candidate
      Auckland, Auckland
      No offer
      Negative experience
      Easy interview

      Application

      I applied online. I interviewed at Lightspeed (Auckland, Auckland) in May 2023

      Interview

      On reviewing the take-home code assignment, it is mentioned that try to complete honestly what you can in 2.5 hours. I hard stop on 2.5 hours as the one who ran this through mentioned it. It is a trap. If you miss something better actually spend more hours to complete everything as they will use to decline you in the process even thou you will mention that is the next thing that you want to complete (as in everywhere from API doc to code comment). It is kind of fair if they refer to non-negotiable completion rather than feature completion. But they should have asked the interviewee how he is planning complete the task as the hard stop disrupted what he initially intended to accomplish when he actually miscalculated the hours spent (by a mere 15 mins left of work). If I spend 15 mins more minutes their only complaint won't be there at all. The question and take-home are very easy I still wonder why I failed, as the feedback only mention that single-item prioritization was not in line with what they expected on the overall submitted solution. Kind of unsatisfying as I felt the question asked was not even in-depth and felt like a question for juniors and not even intermediate. I was looking forward to a more in-depth profound question on the supposedly next interview step.

      Interview questions [1]

      Question 1

      How to handle an endpoint that returns a lot of data
      1 Answer
      1
      avatar
      Lightspeed response
      2y
      Hi there! We're sorry that you felt you didn't get enough feedback, we're always more than happy to provide more details and answer questions to unsuccessful candidates if they reach out. If you would like more detailed feedback on your application please reach out to a member of the Talent Acquisition team to organise a call with one of the SDMs who can provide more detailed feedback. We strive for fairness and being respectful of candidates' time and don't wish to impose a massive time burden upon them through an open-ended and lengthy technical task which is why we set the time limit. We are sorry that you felt this was a trap, we will make sure to update the way we communicate the time limit to candidates moving forward. Thank you for taking the time to share your experience. It is thanks to people like you that we understand what we do well and where we stand to improve. We wish you the very best! -The Lightspeed Talent Acquisition Team

      Other Senior Software Engineer interview reviews for Lightspeed

      Senior Software Engineer Interview

      21 Mar 2026
      Anonymous interview candidate
      Berlin
      No offer
      Negative experience
      Difficult interview

      Application

      I interviewed at Lightspeed (Berlin)

      Interview

      I experienced the interview process as very disrespectful. Only during the feedback conversation after my rejection did I learn that the position had effectively shifted toward a mid‑level role, something that had not been communicated to me beforehand. I was told that this feedback that I am, somehow, actually a mid level developer (despite covering the job of a senior) was told to me “for the sake of my future.” In my view, questioning a candidate’s seniority, especially when they have already held comparable roles for years, is inappropriate. I ultimately accepted a senior position elsewhere with higher compensation and full remote, without mandatory “pillar days” of attendance or whatever you called it. For me personally, remaining unemployed would have been preferable to working here.

      Interview questions [1]

      Question 1

      Mostly technical coding questions that in my opinion really relied on mnemonic knowledge and became obsolete after LLMs
      Answer question
      1

      Senior Software Engineer Interview

      18 Feb 2026
      Anonymous interview candidate
      Berlin
      No offer
      Neutral experience
      Difficult interview

      Application

      I applied online. I interviewed at Lightspeed (Berlin) in Feb 2026

      Interview

      The process started with an initial screening round, followed by a technical interview with system design and then a round with deeper technical discussion with code review. The team was professional and direct throughout the process. Communication from HR was clear and timely. The interviews were heavily focused on core Python fundamentals, concurrency concepts, messaging systems (queues, Kafka/RabbitMQ), transactions, and system design. The technical depth expected was quite high, especially around language-level concepts such as context managers, decorators, and concurrency primitives. In the later round, the discussion became very detailed around Python internals and low-level constructs. When I wasn’t able to confidently explain a specific core concept (context managers), the interview was concluded early with the feedback that for a Senior role, strong fluency in core Python fundamentals is expected. What I liked: Interviewers were technically strong and clearly knowledgeable. Questions were practical and relevant to backend engineering. Clear feedback was given directly. What could be improved: The process felt somewhat unforgiving; the interview was ended early based on one foundational gap rather than evaluating overall system design and backend experience. A slightly more holistic evaluation of seniority (architecture, real-world impact, problem-solving) alongside language fundamentals would make the process more balanced.

      Interview questions [1]

      Question 1

      Decorators Concurrency (GIL, threading vs multiprocessing) Transactions and atomic operations Messaging systems and delivery guarantees
      Answer question
      1

      Senior Software Engineer Interview

      3 Feb 2026
      Anonymous interview candidate
      Amsterdam
      No offer
      Positive experience
      Average interview

      Application

      I applied through an employee referral. I interviewed at Lightspeed (Amsterdam) in Jan 2026

      Interview

      The interview process consisted of a recruiter prescreening call, followed by an interview with the engineering manager, and finally an in-depth technical interview focused on problem solving, system design, and practical engineering skills.

      Interview questions [1]

      Question 1

      idempotency, canary deployment, blue-green deployment
      Answer question