Very straightforward and painless, they have different procedures depending on if you're software or research and if you're PhD or masters. I had a good experience, very conversational- brush up on ML fundamentals. Have ideas for what you want to do with your time.

The interview process started at the career fair at my school, I signed up for an interview to ask questions about the company. After you can follow up and apply on their career website.

First interview with HR, second interview with the department manager and third with another manager, but this one is a role play with this manager. They will explain everything you need to prepare. Also, They were asking basically the same questions in the two first interviews.