Applied online, got an email for a phone interview. Pretty standard first phone screen, except with both HR and an engineer simultaneously. Asked about my experience and why I was interested in Momentum. Next was a set of take-home problems. Third round, video call technical interview. Didn't move on.

Extensive. I had 6 interviews including an onsite one which lasted 6 hours, including 2 hours with the CEO. I felt like they were looking for a reason not to hire me.