Usual interview process includes two parts: a couple of tests (you are doing them alone during limited time interval, on site) and interview with 2 of engineers + maybe manager. After getting an offer you may get a few options of which team are going to join. Since company's core competence is Java requirements for different teams are very close to each other (unless are iOS or Web developer). The first part, the paper test, again includes two part - one for common IT-knowledge (like translating numbers from one system of counting to other) and one specific for position you are applying for (usually Java). The interview part lasts for 2-3 hours with same people and may include various questions depending on the target position. If you are applying to more specific position (like Android\iOS developer) there will be at least one engineer working on such position and he will ask some practical questions.