First was an HR screen, very typical. Second was a 1 hour interview with a single hiring manager that includes technical questions and a coding challenge using HackerRank. The third is a 3-hour multiphase interview with multiple. It includes multiple teams/titles and also includes more technical questions and coding challenges via HackerRank. If you don't do the challenge fast enough or to their liking, they will dismiss you part way through the 3 hour process, which is what happened to me.

One phone call with the recruiter, followed by a simple tech interview with the hiring manager, followed by a more thorough coding interview with some of the team members, followed by an interview with the team, and a last phone call with HR