I applied through a recruiter. The process took 2 weeks.

Pleasant process. No leetcode-like coding questions, very research oriented.

First, a screening call with the engineering lead, then two technical interviews followed by some culture fit calls. All coordinated by a hiring manager.

Very hard to generalize. I think both technical interviews are tailored to the applicant.

First one is generally about the subject you would handle as a member of engineering. Second one is an overview of what the team you would be joining.

In my case this was questions with a researcher, discussion like around multiple aspects of the synthetic data generation in the first interview, and about the same around pre-training in the second.