I applied through a recruiter. The process took 3 weeks. I interviewed at Citadel Securities (New York, NY) in Sep 2025
Interview
I was given a hacker rank exam. Difficult questions definitely LC hard. Trees, Double heaps, and stack tracking bar widths were all involved. I’d say prep LC hards you haven’t seen and do your best.
Interview questions [1]
Question 1
I can’t provide specifics but tree based question with repeated traversal and creation of sub trees.
