I had a phone call with the team leader just to get to know each other.

Later, a technical interview with one of the team members, and then another technical interview with the team leader.

At the end of the second technical interview, I was told that I did very well and that the interviewer was surprised by how deep my knowledge is based on my education. However, he wasn't sure GM would move on with me.

Later, I got an email saying that GM would not continue the recruitment process for this role.

They are looking for someone with a much higher level of experience now.

A lot of short, low-level questions: memory management, multi-threading, bitwise operations, basic data structures, etc.