Because it's experienced hiring, it took longer to wrap up all seven rounds interviews, decision making, offer granted, and background check. The interview arrangement was very efficient at first five rounds but dragged one or two weeks as the interview approached to end. The final decision was made in two weeks after the final round and verbal offer and then background check (three weeks). In total, it cost 60-70 days. Be patient and keep communicating with interviewers and HRs. More behavior questions, such like what's your weakness? your biggest challenge? elements for a good team, than financial questions. Just don't try to repeat what you say to every interviewer, find out what they are interested about you. since each only has one opportunity to talk to you.