They give you a huge assignment on any Cloud, Chef installation and deploying a stack and after reviewing it, They will setup an interview with at least 7 people and that is scheduled for 3 hours where each and every one will dig in deep into their skillset,So,they want you to be an expert in each and everything of what those 6 or 7 interviewers lifetime experience is. They have huge expectations and their salaries are not that great. It is very hectic interview process. Followed by an in person round of interview. Their salaries around 100k to 130k,so think if its really worth your time and struggle and only go for it only if you're confident.