The interview process at Optiver for the Software Engineer position starts with a 4-hour Online Assessment. It includes two coding questions, followed by multiple-choice questions (QCM) on computer architecture and networking. The assessment concludes with games designed to evaluate problem-solving and cognitive abilities.
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