I applied online. The process took 4 weeks. I interviewed at Citadel (Singapore) in Dec 2020
Interview
test on HackerRank, basic question, with SQL Fix puzzle,python,linux
then call on zoom.
tell about work, given some situations, how do you handle?how do you lead?
some back order flow questions.
then test puzzle, python, linux,again
I applied through a staffing agency. I interviewed at Citadel (Chicago, IL) in Oct 2018
Interview
Phone screen setup by HR who was very nice and professional. First phone interview was with Team lead. Again, very nice and professional but extremely difficult interview for a first screen. Deep dove right into linux, multicast, python, and trading terms. At the first sign of stumbling he basically said, thanks but no thanks (in a respectful way). Their bar is HIGH. Expect a grilling.