The whole interview process took 3 days comprising of 15 rounds which includes 2 manager and HR round. the interview started at 10.30 and finished by 5.45 and second and third day was for half a day

It was worst interview experience I have ever had. Interview has 7 rounds spanning over 3 months. All rounds were in US time zone. After last round there was no communication for 3 weeks. I called for enquiry and was informed that they don't need a staff engineer now instead they need a lower rank role. Very unprofessional company. I will suggest never waste time by appearing interview for this unprofessional organisation