referred by a friend. 1 phone interview and 6 round onsite interviews. Interviewers are pretty nice, they will help you through the most difficult problems. Your thinking process is more critical, though the answer still matters.
Interview questions [1]
Question 1
1. Make a market on square root of 30
2. Tell arbitrages given a set of tradable instruments
3. Python basic
30-45 minutes phone interview, introduce and describe one past experience, then technical problems, mainly have probabilities and brainteasers, cards, dice problems from green book, brain teasers difficulty above green book, rejected
I applied online. The process took 4 weeks. I interviewed at Citadel Securities in Oct 2022
Interview
I had one phone interview and then the super day, though my process might have been abridged since I had a competing offer. The first interview was standard probability and EV questions, and the super day consisted of 3 interviews with traders and a game competing against the other applicants.
Interview questions [1]
Question 1
Lots of questions about projects I did at my previous internship
I applied online. The process took 4 weeks. I interviewed at Citadel Securities (New York, NY) in Oct 2022
Interview
The first round was a phone screen with a trader followed by a virtual onsite. Onsite was a mix of auction games, market making on theoretical quantities with imperfect information, fermi questions, and some EV estimation questions.
Interview questions [1]
Question 1
Expected number of dice rolls to see each number twice