I applied online. The process took 2 months. I interviewed at Citadel Securities (London, England) in Jan 2020
Interview
Phone interview followed by onsite interview. Onsite interview is four 1 hour interviews. The process took about 2 months from start to finish. Overall the process was pretty smooth and recruiters were responsive.
First is a phone call with recruiter, then phone screen with a trade with some resume questions and then technical questions. After that can be a second phone screen then onsite round
Interview questions [1]
Question 1
Expected number of times to roll a dice before getting 2 6's in a row
quite unorganised interview. had a face to face interview with 2people from the company. They asked a lot of questions to get some colour rather than really trying to hire someone.
Had a recruiter phone interview then two technicals followed by an onsite final superday, much more technical than other firms and more strict. Flew out to new york for the onsite.