Emails, 2 phone calls, with skills reviews, where I had found the company and motivations, 2 interviews on site (2 different offices), review of my resume and chat with the CEO during the first interview and visit the office. Second interview with CFO and business dev alone. It was very laid-back but professional, trying to assess if I fit the team and project, if I was able to work independently and tell me what to expect of the job.