Pulsenics Application-Engineer interview questions

Started off by applying online, then was called by an external recruiter. I then conducted a skills assessment and interviewed in person at Pulsenics. The company's operations were interesting, but the interview was unprofessional and unstructured. The interview was cancelled various times, and the interviewer didn't show up at the location at the confirmed interview time.

Lengthy, tough technical exam. Many meetings with HR then met with CEO and COO. asked to review the technical exam and ask about prior experience. Very lengthy between each interview