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      Simplex Trading

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      Software Engineer Interview

      Feb 25, 2026
      Anonymous Interview Candidate
      No offer
      Positive experience

      Other Software Engineer Interview Reviews for Simplex Trading

      Software Engineer Interview

      Apr 10, 2025
      Anonymous Interview Candidate
      No offer
      Negative experience
      Average interview

      Application

      I interviewed at Simplex Trading

      Interview

      Their internal recruiter was adamant that they don’t do any object oriented programming, only C++. She was so confident that I didn’t think it would be worth correcting her. I don’t think there is anything else to say here.

      Interview questions [1]

      Question 1

      What are your salary expectations?
      Answer question
      Easy interview

      Application

      I interviewed at Simplex Trading

      Interview

      Applied on website. HR contacted and scheduled a phone screen. Very quick. Then scheduled a technical phone screen. My brain was foggy from project I had been working on the day before. Different tech, different priority. Basically I went in misfiring.

      Interview questions [1]

      Question 1

      Current architecture of current project. And quite a few follow-ups on tech used and why. Most proud technical achievement. List vs vector - theoretical performance and the real world. Current architecture of current project. Most proud technical achievement. List vs vector Map vs unordered_map L1, L2, L3 cache and how to utilize them better Latest interesting technology thing you’ve learned. Latest interesting thing you’ve learned about c++ Theoretical performance & actual world: - linked list vs map - map vs unordered_map L1, L2, L3 cache and how to utilize them for performance Latest interesting technology thing you’ve learned. Latest interesting thing you’ve learned about c++
      Answer question

      Software Developer Interview

      Mar 17, 2024
      Anonymous Interview Candidate
      Chicago, IL
      Declined offer
      Negative experience
      Easy interview

      Application

      I applied through a recruiter. The process took 2 weeks. I interviewed at Simplex Trading (Chicago, IL) in Mar 2023

      Interview

      Simple verbal interview about various C++ features, simple questions (leet code variety, easy/medium), then simple behavioral with HR; chat with the CTO. Not really much information gleamed about the company, other than everyone being nice.

      Interview questions [1]

      Question 1

      Linked list kth before last element.
      Answer question