Multiple interviews over multiple months. They were very vague and unresponsive in their questions, answers and followup during the process. So much so that, even when they offered me the position, I wasn't sure if they were actually offering it to me or not. Their "process" was a mess but the actual interviews and testing were banally easy. In hindsight, this should have been a big warning sign about their poor management and disorganization. Ironically, the interview process took 9 months, I realized my mistake after 3 months and I left this disorganized, unethical company 18 months after being hired.