I applied through university. The process took 3 weeks. I interviewed at Optiver in Oct 2018
Interview
Mental math test into phone screen by HR and then a technical phone interview. Mental math test was basic arithmetic followed by sequences. HR phone interview was entirely behavioral. Got cut at phone interview.
Interview questions [1]
Question 1
Why Optiver? Why trading? Technical was mental math and brainteasers.
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.