A couple of virtual interview rounds followed by multi-round onsite interviews. The recruiter was really helpful and gave feedback throughout the process.
The onsites were a mix of casing and a very bizarre culture fit/ behavioral round with some of their senior engineering and product team managers. In the behavioral, I was asked about all my major decision-making throughout my education and career. Some were regarding decisions I made over a decade ago, including questions like what colleges I applied to, got into, how I chose the college I attended, etc.
Apart from the in-person behavioral round, the process was straightforward (product cases) but challenging. There is an emphasis on technical depth and speed/clarity of responses.