I loved their interview questions. I would definitely suggest doing a lot of algorithm questions before applying to them.
Speed is important!
I would also solve more puzzles and not only coding tasks to get prepared.
Balloon test to see your risk tolerance.
The following metrics were computed from 30 interview experiences for the Optiver Software Engineer role in Amsterdam, Netherlands.
Optiver's interview process for their Software Engineer roles in Amsterdam, Netherlands is extremely selective, failing the vast majority of engineers.
Candidates reported having good feelings for Optiver's Software Engineer interview process in Amsterdam, Netherlands.