Multiple Rounds + Project and demo. The Project isn't "necessarily" hard but I had a highly negative experience overall. The product broke/wouldn't install correctly. I pulled multiple all nighters to try and get things working properly, had to spend my own money to allocate a cloud server since the one they provided wasn't working properly. It was rushed and a huge time drain overall between the projects and multiple rounds of interviews. I wouldn't recommend interviewing with them for this position. The fact you have to do unpaid work is pretty absurd to begin with. Poor communication between recruiter and myself and unrealistic expectations for the amount of time for interviews (seriously I spent over 8 hours interviewing to not get the position......)