I applied through a recruiter. The process took 2 weeks. I interviewed at Duo Security (London, England) in Mar 2018
Interview
Quick call with US recruiter, followed by a written exercise, then scheduled 2nd call with hiring manager and engineer. Followed up with an onsite interview with 6 individuals 4 of which were video-calls.
Interview questions [1]
Question 1
3 and half hours of interviews, so lots of questions! Obviously some repetition, but all questions were skills/background/role related - very friendly and comfortable chats.