I applied through college or university. The process took 2 weeks. I interviewed at Citadel Securities (London, England) in Dec 2023
Interview
1 call (CV fit + technical questions) and 2 other interviews (one full of maths with a senior quand researcher and the other full of coding with a software engineer).
Interview questions [1]
Question 1
CV presentation + two brainteasers (one on the expected number of throws before having the first HHH and one on option pricing)
I interviewed at Citadel Securities (London, England)
Interview
Dynamic programming question with some expectation computation. It also involved cv based questions with emphasis on technical topics on the projects I did. It was okay on difficulty, I could have passed it.
I interviewed at Citadel Securities (New York, NY)
Interview
resume submit, then 45 min call with interviewer. interview was really nice, calm, and provided guided hints. first 30 minutes were technical on math and coding and next 15 min were behaviorual.
I interviewed at Citadel Securities (London, England)
Interview
Long discussion about stats concepts like hypo testing, regression etc. Multiple standard brainteasers, can be found online. Interviewers are helpful, it is a genuine discussion rather than a one way solving interview
Interview questions [1]
Question 1
Long discussion about stats concepts like hypo testing, regression etc. Multiple standard brainteasers, can be found online.