I applied online. The process took 2 weeks. I interviewed at Optiver (London, England) in Aug 2025
Interview
Online HackerRank question - given requirements and have to implement a class that represents a certain system (not that algorithmic)
Then behavioural interview with 2 members of HR, fairly standard.
Interview questions [1]
Question 1
Why work here?
Explain your background.
Tell us about a time that you failed or didn't meet expectations and how did you deal with it.
What would others say is your weakness? (Soft skills wise)
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
