Great process and very respectful one.
First, I had one phone interview with the HR, and after it 4 additional 1:1 interviews with professional subjects in the company.
During the process the HR always were in contact with me, and responded very quickly between each interview stage.
Eventually I didn't hired for this position because the company looked for more junior candidate profile for this specific position, but after the negative answer, the CTO made a phone call with me to speak about future positions, and that was really nice by him and I'd really appreciated it.
Looking forward to speak with them again!