I applied online. The process took 3 months. I interviewed at Optiver (Amsterdam) in Dec 2025
Interview
I completed the online assessment in September and was invited to a behavioral interview in December. The interview felt quite rushed. The recruiter interrupted me frequently, which made it difficult to fully explain my answers or demonstrate my reasoning. She did not seem very interested in hearing my responses and appeared eager to finish the interview as quickly as possible. I had a strong feeling immediately afterward that I would not move forward, which was confirmed by a rejection the next day.
The interviews consisted of an OA, then behavioural, then technical and thena final round consisting of another technical, system design and behavioural. These last interviews all an hour each. I only got up to the first technical.
OA; quite long, 3 tests
Behavioral interview: just a short talk with HR, motivation,…
Technical Interview 1: fundamental CS, nothing more
Technical Interview 2: system design, very vague but just go with the flow
Technical Interview 3: live coding, still leetcode but optiver style is a very descriptive problem, but the main thing could be boiled down into only few lines
