Long and difficult hackerrank + many, many interviews. Double the amount of interviews that Google had me do, in fact. Positive feedback at every step of the way, including from the CTO, then a generic rejection email. Over 2-month long process. Probably wouldn't have done it if I knew I'd have to jump through so many hoops.
I applied online. The process took 2 weeks. I interviewed at Simon AI (New York, NY) in July 2020
Interview
60 mins tech interview 30 mins behavioral. Interview was held over zoom due to covid19. Started with a behavioral then move on to hackerrank pair coding. Ended with behavioral again. Difficulty probably leetcode easy-medium level.
I applied through a recruiter. The process took 2 weeks. I interviewed at Simon AI in Nov 2019
Interview
I was sent a 4 question coding challenge to complete in 2 hours. Upon passing, I was invited to complete a technical interview with a current employee via video call.