There was one on-campus interview lasting 45 minutes, followed by approximately 6 hours of on-site interviews at their headquarters.

The on-campus interviewer was nice and was an alumnus. He asked some interesting questions and provided good feedback. The questions were interesting and challenging, but not tricky. I appreciated that the focus was primarily on coding and algorithms rather than math questions, which was consistent throughout the on-site interview process as well.

On-site interviews lasted a long time. There were four technical interviews lasting around 50 minutes each, including a practical interview where I had to work on an existing codebase. One of the interviews focused mainly on algorithm design, which I found quite engaging. Overall, it was a well-rounded interview process with good questions, although it left me quite exhausted. There were no trick questions or brain teasers, just a series of real-world-ish problems and traditional algorithm questions.

At the end, there were a couple of non-technical interviews that were much more relaxed, where we discussed my resume and my thoughts on Quora.

The practical interview section has you hack on an existing codebase in Java/Python, which wasn't something I'd seen before.