I applied through an employee referral. The process took 7 weeks. I interviewed at Citadel (Chicago, IL) in Mar 2019
Interview
Had a phone interview that was purely technical, then an onsite that consisted of algo/ds questions, c++ questions, and general coding questions. People were very cordial and kind. Amazing views. Make sure you know your data structures and algorithms as well as C++
Interview questions [1]
Question 1
How are priority queues made, how to determine identical binary trees, find missing numbers, find duplicates,
Compared to other interviews, the coding questions were much difficult questions, but the time was too short to solve it completely. I don't know if it was the difficult one.
I was contacted for a phone interview and it was mostly technical and no behavioral questions. the interviewer was fairly nice but asked me a lot of questions regarding product production.