thirty minute OA for fifteen questions. Stuff about probability like combinatorics, bayes rule, markov chains, et cetera. Also one question about t-test. Takes a while to get back after OA.
Questions d'entretien [1]
Question 1
What is the probability the coin is biased (always heads) given seeing 5 heads in a row
J'ai passé un entretien chez Citadel Securities (New York, NY)
Entretien
Three stages. Timed online assessment on probability, combinatorics, mental math, and estimation. Short recruiter call on fit and motivation. Virtual onsite with several 30 to 45 minute rounds on market making, risk reward tradeoffs, brainteasers, data interpretation, and teamwork. Decision in about a week.
Questions d'entretien [1]
Question 1
Three stages. Timed online assessment on probability, combinatorics, mental math, and estimation. Short recruiter call on fit and motivation. Virtual onsite with several 30 to 45 minute rounds on market making, risk reward tradeoffs, brainteasers, data interpretation, and teamwork. Decision in about a week.
Applied online. Once past the resume screen, there were 2x phone screens, which if you passed, was followed by a final round superday. Superday consisted of group questions as well as individual questions.
J'ai postulé en ligne. J'ai passé un entretien chez Citadel Securities en août 2025
Entretien
started with an online assessment and then first round was like brain teasers and then the second is harder probability question and then it’s a super day and then you get the offer