I applied through university. I interviewed at Optiver (Chicago, IL)
Interview
Preliminary - 80 questions in 8 minutes, pretty simple if you are good with numbers.
First Phone Screen: Spoke about basic competency based questions, it was a nice conversation and got the feeling that they value your social adaptability skills.
I applied through university. The process took 2 weeks. I interviewed at Optiver (Chicago, IL) in Dec 2017
Interview
Initial online test, phone interview, second set of online tests, and superday. Superday consisted of a computerized wunderlich test, sequence test, and multitasking test, as well as a behavioral interview, market making game, card game, and shadowing.
Interview questions [1]
Question 1
Calculate the expected value and standard deviation of a deck of cards. Do the same for a deck of cards with all face values squared.