Interviewed over the phone with 3-4 different people ranging from recruiters to designers before being called in for an on-site interview. I had also submitted a design test halfway throughout this process, and never really had to go into depth about it over the phone. All of the people I talked to were amazing at interviewing, which helped me be able to show my thought process and connect with them as people. Was a mix between typical interview questions and theoretical questions based on my answers, and was more of a conversation than "I ask, you answer". When I got to Washington, it was a half day marathon of interviews starting from 8:30am with a tour from the recruiter, followed by three, hour 1/2+ long interviews, a lunch, and an end with the recruiter. During the interviews I met with two people each, and used the whiteboard every time. They really look for you to explain your thought process, even if you may be wrong or change your answers as you work. They just want to know how you think. Lunch was with a group of 3 people and more casual. Overall it was a difficult day. But regardless of the outcome, it was a great experience, a great place, and I met some cool people along the way.