Many rounds. First two were by phone and very motivational. The 3d one was in the office with a manager, more technical. The 4th one was with 2 managers and HR, simple standard motivational and technical questions. After 3 weeks after - still not even a feedback.

I' had the initial interview with the HR. It was the classical group interview (8 person) during which the interviewers submitted us a case of study on the launch of a new product, having some market value given. There wasn't an univocal solution, they just evaluate how the applicant interact with the group.