Had an initial phone call with a recruiter. Then, I got a ~30-question multiple-choice assessment on various CS topics.

Next, I had a technical phone screen. I did well and received feedback. I was invited to an onsite interview. I had four interviews (with some SWEs, a director, etc.).

I was rejected in the end (a week after the onsite). They said there were positive points, but my performance wasn't strong enough to move forward with an offer.

On-site questions are similar to the ones someone else posted here if you apply to an NLU position. But that may or may not change depending on your interviewer.