It started with an HR phone call. Then there was a behavioral which lasted approx. 1 hour. After there was a technical which lasted 6 hours. Then finally there was an in-person interview with a number of current employees. They also required 3 references.

This interview process was the most thorough and dense experience I have ever had to go through with a company. 8+ hours of total interviews for them to unfortunately move on with other candidates with no feedback after the 4th round (including OA). The interviewers in the final technical assessment (6 hours long) seemed disinterested and offered no feedback on my code at all after the review of my solution, almost like they knew who they were going to move forward with before the interview started. The rest of the reviews are accurate, they will ask you to describe an elevator system specifically DSA in the 2nd round, and you will initially be given a leetcode style OA with 2 problems before speaking with the recruiter.