Phone screening and on-site interview in two different days. Questions mostly technical but all of them easy. Whole interview lasted about six hours, and got though seven different people. HR questionaire at the end.

firstly through phone call then an invitation to meet people there. the human resources are very helpful and people are smart. they have 2 locations in USA. i met around 8 peoples, they have different skills. the questions are not easy. people there have a deep knowledge