I applied online. The process took 2 months. I interviewed at Citadel Securities (Sydney) in Aug 2023
Interview
The first half of the interview covered questions of behaviour and motivation, which were all fairly standard. The second half of the interview was a set of technical questions based on a statistics game, which focused heavily on combinatorics, general probability and trades.
Interview questions [1]
Question 1
Can you describe what you understand or believe a trader does in a typical working day?
I interviewed at Citadel Securities (New York, NY)
Interview
Online Assessment followed by 2 rounds of interviews with traders who ask you general probability questions / market making games. Then an onsite in the office which had a mix of a group game and 3 rounds of interviews; which had a mix of statistics and probability. Game was also similar in concepts. Very traditional quant process.
I applied online. The process took 4 weeks. I interviewed at Citadel Securities (Sydney) in Mar 2026
Interview
5 rounds - oa, 4 virtual interview rounds. oa consisted of probability, expected value and statistics questions. 1st round consisted of easy problems and market making. 2nd round had hard probability questions.
I interviewed at Citadel Securities (London, England)
Interview
Questions in earlier rounds were fairly easy. Final round was more difficult and open ended but overall quite interesting. One of the interviewers was very rude and kept going on his phone.
