After I applied, I received an online assessment shortly. It was HackerRank-styled. I had only two choices of language: C++ and Java. A bit difficult than average, but doable with a lot of practice.
Questions on C++ data structures
The following metrics were computed from 1 interview experience for the Optiver Graduate Software Engineer role in Amsterdam, North Holland.
Optiver's interview process for their Graduate Software Engineer roles in Amsterdam, North Holland is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Optiver's Graduate Software Engineer interview process in Amsterdam, North Holland.