Contacted by recruiter a few weeks after applying online. Initial phone screen with recruiter covered why I am interested in facebook and a short product case interview question about how I would design "friend search" from scratch. I didnt do a great job answering this qurstion, nevertheless i was invited to a follow up video interview. Next step was two 45 min video interviews: one about product sense, another about execution. The recruiter was very engaged throughout the whole process. He provided a guideline prior to the video interviews to explain the format of each. This enabled me to prepare, which was great because the questions were rather abstract. He also reached out to me a few days before the interview to see if I had any questions. 1st interview: product sense How would you build "video home" on desktop? 2nd video interview: execution Go back to 5 years ago when the like button on facebook was a simple feature. How would you improve it? During our discussion the interviewer asked the following questions: What would be your goal for this feature? What metrics would you identify to measure your goal? Define the metrics precisely - what would you measure exactly? How would you test the feature to determine if it is successful? This was a tough question because I was naturally inclined to explain the solution that already exists on facebook today, which is the feature with with emoticons that allows users to express of they are happy, sad, angry, etc. It would have been easier to have been asked to design a feature that didn't already exist. Overall the interviewers were professional, courteous, and asked questions that I felt reflected the skills needed to build innovative features on facebook. It was clear from the interview that I wasn't the right fit for Facebook.