It started with a brief chat about the weekend, nothing related to the job. It was good in order to feel more comfortable. Afterwards, I was asked to tell something about myself and then, to explain why I would like to work for the company. Later on, I went through some logical questions based on technical drawings to test my problem-solving skills. It ended up with my turn to ask about anything I wanted to know. 20-30 minutes in total. Kind guy.