I applied online. The process took 2 weeks. I interviewed at Optiver (Amsterdam) in Nov 2021
Interview
Mental math test: simple arithmatic, but there is a lot of time pressure.
Numeric reasoning: Again, not insanely difficult. Just recognise patterns. Plenty of websites online that do a decent job of replicating
2 Phone calls: Testing numerical competence.
Interview questions [1]
Question 1
Tell me a time when you had to think strategically.
First you send your CV and then you get different "challenges". One for sequences, one for probability and one for coding. All of them are quite hard, especially the probability one.
Interview questions [1]
Question 1
Roll one hundred dices, remove all possible groups of 1,2,3,4,5,6. Expected amount of dices left.
OA, phone, 3 interviews, each was a fun game that required risk taking and dealing with expectation. stay level headed and think about many cases. communicate clearly with your interviewer and explain everything.
a sequence of cognitive brainteasers requiring speed and accuracy, First round / online assessments consists of game-like rounds . Make sure to not hesitate in video rounds, as they are testing your confidence too.