Met a Zillow employee at a career fair in Los Angeles, and expressed interested in account management. He gave me his card and I sent him my resume/cover letter for him to forward along. 2 work days later I spoke with a recruiter who explained the details of the position. 2 work days after that I spoke with the director of the team and he invited me up to Seattle to interview for the position. I flew up the next week for the in-person interview process which is four 30 minute one-on-ones. 1st with the team director, then a team lead, then a team lead from a related team, and lastly a department exec. I got a call the next morning with an offer.
Very casual and nice people. Do your research before hand. You should have well prepared answers for what you think Zillow is (hint: they are a media company), the duties of the role, your relative experience, and your personal goals/future.