I applied online. I interviewed at Citadel Securities
Interview
Online assessment covering probability. Then two phone interviews. Did not make it to the next step. Questions from green book and basic probability. The phone interviews also covered resume material and motivations to go into trading.
I applied online. The process took 2 weeks. I interviewed at Citadel Securities (Chicago, IL) in Nov 2025
Interview
Pretty interesting with a few brainteasers (dealing with unknown information and get a rough estimate about them ) and a probability question. Both are pretty easy but I messed them up.
I applied online. The process took 3 weeks. I interviewed at Citadel Securities in Sept 2025
Interview
Had a referral but had a ~30 min OA + 2 rounds of 45 min of mainly technical + in person super day (that I didn't reach). Was pretty standard for a quant trading interview. They were very responsive.
Interview questions [1]
Question 1
They asked a weird betting game with unknown balls in a bag and unknown draws.
Overall, they were responsive and happy to interview. My interviewer was really nice and the problems were fun to tackle. Although I was rejected it was a good experience overall.
Interview questions [1]
Question 1
Market making games and probability problems(expected value but twists on it)
