Applied through referral link. Had first round interview (30-45 min phone screening) a few weeks later. This consisted of 10 mins background and behavioral questions, 15 min coding question, and 5 minutes of questions. Interviewer was really nice and encouraging. I was told the next day I would have a final round interview in Redmond. I scheduled my interview for 5 weeks later. I was not in the country at that time so Microsoft allowed me to complete the final round over Skype. The final round consisted of four 45 minute interviews. The interviews varied, and the interviewers went in ascending order of seniority at the company. First interview was talking about my background, a few problem solving questions, and a product design question. Second was talking through hypothetical questions of what I would do if I were a PM in certain situations, and then talking about what factors I would consider in product design/development/launch. Third was mostly background, behavioral questions, and again what factors I would consider in developing an app. Fourth was not really an interview, but more just a discussion about security concerns and some questions. Great interview process overall!