I applied online. The process took 1 day. I interviewed at Optiver in Nov 2021
Interview
It was an online assessment consisting of 2 questions, and I finished within the given time and got all tests passed but got rejected within 3 days. Not sure why this happens.
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