I reached out via email to a recruiter I had met while interviewing there for a internship last summer. While the recruiter had since left the company, another responded and sent me the coding challenge. After the coding challenge, they wanted a phone screen. However, they allowed me to skip this and move right into an onsite interview in Seattle due to my existing travel plans and offer deadlines. I was very impressed with them for being so accommodating - from the completion of the coding challenge, they got me through the entire interview process in 10 days. The onsite interview itself consisted of ~4 interviews, with a break for lunch in the middle, during which a recent hire at Zillow kept me company. At the end of the interviews, the recruiter sat me down and told me initial feedback looked good. Within a couple of days after the interview they came back with an offer - overall, one of the most efficient and least painful interview processes I have experienced.