After the recruiter call, there's a staff interview. Then a technical test conducted by a staff member. Then a marathon interview day with multiple meetings and presentation at the end.

Recruiter contacted me directly on Linkedin about a backfill position. Finished recruiter screen, then technical interview with question below. Then interviewed with hiring manager who explained that position would involve traditional ML. I wasn't interested in the role after that, so declined invitation for final round (5.5 hours of virtual onsite with presentation, system design, another technical interview on ML fundamentals, behavioral, etc.).