The first interview was pretty chill. I felt very comfortable speaking with the guy on the other side of the phone. He wanted me to tell him about projects that I had overcome, challenges that I had to face in the past, etc. After a week the recruiter contacted me again for a second technical phone screen. In this second interview the person on the other side was also very nice. He let me know first that it was very possible that I don't know some of the questions, which made me feel less nervous. There were so many questions in a row, some of them very typical such as the difference between UDP and TCP, NAS vs SAN, etc. He barely asked me about AWS, which I had studied the most.
The experience was great, although I didn't get an offer.