Pre-HR voice call, HR video call, online coding test, 3 technical interviews as video call. Classical personality questions in HR interviews. Classical technical questions in technical interviews. Average difficulty. I answered 47 of 50 questions correctly in the last technical interviews, also answered remaining 3 questions but I have little professional experience about them. At last, HR called me and the result is negative because I haven't so much working experience about that 3 items and they are looking for a "principal" software engineer. At the beginning they say that willingness to learn is very important for them and they have principles about that. The results conflict about those statements. Maybe they have some problems about relocation or nationality. Totally waste of time.