First of all, I have received a call without scheduling from HR. During all the process the company changes the interviewer three times and I was lost looking for one of them to give me some feedback. The next step I had a hard technical interview, however, it was okay. The real problem is that I didn't have a feedback and the interviewers just disappeared.

My advice is that participants must read the description and not the tittle. In my case tittle said .net engineer but I was being interviewed for a devops anedineer position.