(1) initial HR interview (brief run through of experiences, basic questions of why you want to join, what can you offer etc.) ; (2) interview with the head of the department (more technical, more specific to the products and services offered by the company and job scope, current issues, commercial & tech awareness); (3) interview with the potentially assigned 2 supervisers (way more relaxed, simply just to see if you're a character fit, team work ethics etc.)