I applied through college or university. The process took 2 weeks. I interviewed at Citadel in Sep 2014
Interview
There were two phone interviews in the same day: it said that one is behavioral and the other is technical. However, the two interviews, from different department, asked me the same kind of questions. It lasted for about 40 minutes each, and there was 5 minutes break between the two phone interviews.
Interview questions [1]
Question 1
The conversations were focused on the latest project I had done in this summer. The first interviewer asked questions like: What is your favorite part of the project? What is the least like part of the project? What is the biggest challenge of the project? What is the biggest mistake you have done in this project? The second interviewer asked me to go through the algorithms I used in the project step by step.
Two 30-minute face-to-face interviews in a row. The first one was all behavioral questions with an HR. The second one was about internship and projects listed on the resume with a junior trader.