HR will contact you. Then you will have a series of interviews with various teams and team members, including engineers, managers and in some cases even directors. This can take up to 3 months. Usually, the engineers will have the most technical questions and most of them are pretty fair in the questions that are asked. Situation based questions along with a serious of technical questions. As you go up the chain with managers and directors the questions, at times, become a bit obscure. Some of those questions come directly from Google. LOL. But all in all a decent experience but definitely a long one.