I had a culture phone interview, technical phone interview and then 4 on-site interviews that were 30 min each that consisted of reviewing a PR with other developers, white boarding questions, design review, and culture/product discussion.

The process was very efficient and quick. Did an HR call to get a sense of who I am and then scheduled the technical screen by the Engineering manager. Once that was complete, they asked if I wanted to do white board problems or a take home project. I opted for the take home project which involved getting data from an API and manipulating the data that was returned. I was also given a pull request to a small piece of code and was asked to review it and be prepared to discuss in the next interview. This last interview was 2 hours long, and they provided an itinerary so I knew exactly what to expect. Met with a bunch of other front-end developers, who were all very cordial. I'd say the interview was overall fairly difficult, and I say that because that last 2-hour interview is pretty intense. I actually felt like I did well answering questions and showing my skillset. I was hoping to get more feedback as to why I wasn't chosen, so I've sent them an email to inquire about it. Overall wonderful experience.