I applied through a recruiter. The process took 2 weeks. I interviewed at Citadel (New York, NY) in Jan 2019
Interview
Contacted by recruiter, got a phone interview with the hiring manager. Talked about background for 15 minutes, asked about a practical quant finance problem for another 15 minutes. The overall process took about 2 weeks and I never heard back from them after the interview.
Interview questions [1]
Question 1
How would you measure the risk of an equity portfolio.