Citadel Securities Quant Research interview questions
based on 9 ratings - Updated Jun 7, 2026
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Citadel Securities interviews FAQs
Quant Research applicants have rated the interview process at Citadel Securities with 3.2 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 40% positive. To compare, the company-average is 53.9% positive. This is according to Glassdoor user ratings.
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I interviewed at Citadel Securities (London, England)
Interview
I had one interview, the questions were cryptic and the interviewer did not seem enthusiastic at all. I only had one interview with them as I was not invited back.
Interview questions [1]
Question 1
p values, alpha and beta error of statistical tests, power calculation, and classic stats questions in lots of detail (did not see the relevance for the job at all).
I interviewed at Citadel Securities (London, England)
Interview
Interview was ok. Probability and coding questions at each round. Got through to the 2nd round technical. Messed up some coding parts at one of the last coding interviews. That was probably enough not to get an offer.
Interview questions [1]
Question 1
Gambler's ruin problem with X ruin threshold and Y>X winning threshold.
first go through resume and aks follow up questions based on your experience. Asked one algorithm question. I was not asked to code but just explain how to solve the question.