Short 10-15 minute phone interview first, then if they like you enough they schedule you for an in person interview. Heads up, make sure you have a few hours to spare for the in person, I interviewed with three people and took a personality type test, IQ, words per minute typing, and excel test. All in all, took about three hours. Was very nerve wracking because I didn't know about these tests beforehand, but the interviewers were very reassuring that they don't base hiring off of just those tests, they just like to use them to see where you are. Fairly informal, more like having conversations with them instead of strict, uncomfortable interviewing. If you pass those stages, you'll get called in for a final interview, mine was with Jill Carey, the COO, who was super nice (and not at all intimidating). After our brief interview, she offered me the job on the spot. Definitely the most in-depth interview process I had, but went very quickly. I had my phone interview on a Wednesday, my first in person on that same Friday, and my last on the following Monday (and I started on that Thursday).