There are 4 interviews in total, I only got up until round 3. They were technical interviews, 1h each one where half of it were technical questions (about resume, or general like how to do this in linux etc) and the other half a leetcode style question

Phone interview with technical questions about C++11, OS, multi-threading and then an hackerrank challenge. They ask questions about your last previous experience, and go on with the technical stuff. You need to remember your textbook university material spot-on. They don't care about the way you answer a question; they want a textbook answer. The 2-3 C++ questions were kinda basic and limited for a developer position. I will leave a review of an "average interview" because it was for a junior Python or C++ position (1-2 years of experience) that didn't ask for low-level networking experience but still they expected me to have previous professional experience in that field. That wasn't indicated in the job offer I applied on, which means to me they don't care about their candidates and recruiting process. I feel they mainly hire based on connections. Interviewers are not managers or leads, no HR in the recruiting process. My advice is not to lose time applying for jobs at that company.