I applied online. The process took 4 weeks. I interviewed at Optiver (Sydney) in Apr 2021
Interview
Applied online and did 3 skills test - first mental math, second data analysis, third probability. For the most part, the questions aren't hugely difficult but the time pressure makes it tough.
After that there was a behavioural interview over zoom, then a final interview, also over zoom. The final interview had elements of probability and mental math, as well as behavioural and market making questions.
OA for Round 1, involves a lot of quick calculations and estimations. Behavioural interview, Technical interviews and final superday. Final superday involves many interviews, but I did not reach that part.
Interview questions [1]
Question 1
Why trading? Have you applied to any other places?
Online assessment followed by multiple steps of technical and behavioral interviews. Pretty standard process in general, positive experience. Seemed to care a lot about cultural fit more than other firms
Multiple Rounds, first was behavioral and second was technical. They first did a pretty lengthy behavioral and seemed pretty good, but then the technical was mainly all Fermi estimations and market making games.