Contacted via email to set up an initial interview. Very plane email, not even the name of the person who was sending me the email (no signature). After it was set up, the time was changed at the last minute. One video interview with the recruiter. One video interview with the hiring manager. I sent a couple of thank you emails to the recruiter and the hiring manager. No answer from them. A week later, I sent a follow-up email to the recruiter. No answer. Another week passed by, and I sent another email. No answer. Very unprofessional.