I applied online. The process took 4 weeks. I interviewed at Optiver (London, England) in Dec 2024
Interview
5 Stages, 1 behavioural then 1 technical then 2 technicals (one focuses on designing a system and one on making leetcode type questions) then a final behavioural with a recruiter and a engineer
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.
They gave a long block of python code and wanted me to find the error in it, then wanted me to explain how I would make the system more scalable.
Application
I interviewed at Optiver (Amsterdam)
Interview
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
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