I applied online. The process took 3 weeks. I interviewed at Optiver (Amsterdam) in Feb 2023
Interview
Firs thing I got was an online Coding assignment and an Knowledge test, the Knowledge test was pretty easy and the coding assignment was pretty difficult, then I had a Behavioral interview and finally a Technical Interview which I did not pass
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