There were 3 stages. 1st stage was a phone call with HR. We exchanged some general information, I explained who and what I am, they explained what kind of job it is and what interview was gonna be. 2nd stage was an online session with an technical interviewer. They asked to solve a relatively simple task online and explain the solution. Nothing special. Then they invited me to visit them in Prague to be interviewed in person. They provided assistance with visa process and booked/paid airplane tickets and the hotel. Interview was carried on in their Prague office (very nice one). It lasted 4 hours. I was interviewed by 4 persons (very high profile Microsoft employees seriously involved in development of Visual Studio and .NET). Each interviewer asked me some general questions to test my "soft skills" and also asked me to solve a problem writing code on a whiteboard (writing it on the whiteboard was the most uncomfortable part of all this). Some tasks were quite difficult, some were sort of tricky. Interviewers were very friendly and very nice. It was a pleasure to meet all them.