I got headhunted on LN and after initial call with a HR person, my profile was shared with a manager searching for Lead Engineer. I had second interview online with manager and tech engineer, and after that I had final and third interview in Lego Campus. Last interview lasted 3h, and covered both personal and technical topics. We had breaks and lunch organized. Overall experience was awesome, and fully flexible to support my needs as mother on maternity leave.

Three rounds below: Recruiter round - talk with a recruiter to determine high-level fit, based on further information about the company and the posting, plus some elaboration on your own background. Hiring manager + other stakeholders - a bit longer and more detailed talk with a group closer to the work, including the hiring manager, again gauging fit at a somewhat high-level. Case - prepare a solution, over the course of a few days, satisfying certain requirements related to the actual job responsibilities.