First interview was with the hiring manager, not looking for technical qualifications so much as "personality fit". Second round was with another principal scientist, asked to prepare a conversation about an example that demonstrates my problem-solving ability. Was not invited to 3rd round, which would have been an on-site interview.

Multiple "feel out" interviews with current team members. Asked questions about why you wanted the role with some sprinkled in technical questions. Final interview was onsite. Multiple rounds of tech interviews with a tech presentation mixed in. Great structure IMO, forced to think on your feet and show real knowledge and experience as opposed to shiny resumes that likely are due to group resources (coming from academia).