I applied through a recruiter. The process took 4 weeks. I interviewed at Citadel (London, England) in Jan 2024
Interview
Initial hackerrank code assessment, recruiter screening (which was skipped in my case due to being external recruiter), first technical round, then 3 back-to-back-to-back technicals, then 2 rounds with engineering leads which are team fit and technical.
Interview questions [1]
Question 1
Leetcodes, generally mediums for the technicals but also a class design (not as much system design but designing classes for a problem statement), and CV grilling