It was very professional, respectful, and technical. The interviewer was very competent, having a long time career asking very related questions in a friendly atmosphere. Directed in a formal one and caused me to be confident in applying for this job. They asked some technical questions related to the job and then a referense check was required to get the job.

first round is call interview, just ask some general questions. second round is on-site interview, they check your background and experience. Also they chack your visibility and give you a PCB board to test your knowledge.