I applied through an employee referral.
I had a recruiter screening, followed by a phone screen on Googliness and system design. Onsite was system design, code comprehension, and people management, which was in person. Onsite also had a lunch with a Googler. Google also gave an option for doing a mock interview that was not used as interview feedback. This was super helpful and highly recommended.
The following metrics were computed from 60 interview experiences for the Google Engineering Manager role.
Google's interview process for their Engineering Manager roles is very selective, failing most engineers who go through it.
Candidates reported having very good feelings for Google's Engineering Manager interview process.