They advertise a lot of job positions and keep hiring which is a negative sign. Looks like the company employees turnover is very high. My process started with a phone call with HR, then they assigned a Power Day for me. A couple of days before that, I had around 30mins casual interview with someone to get more familiar with the company culture. The Power Day has been explained enough in previous comments so I try to be brief. It's very exhausting and not very challenging at the same time, you just have to memorize their typical questions. On the other side, most interviewers are super bored since they probably keep interviewing a lot of people with repeated questions. Then HR let me know that I've passed the Power Day and they need to fit me with a hiring manager, BUT he told me they can give me a lower position now [PA instead of Lead Engineer]. It's a known game among HR people to hook you up with good promises then after spending a lot of time and energy they'll tell you that they can give you only this lower level. Anyway, I still interviewed a couple of managers and found it not very interesting workspace for my career/life. Overall, as people mentioned earlier, they're good if you want to practice interviewing but don't expect any serious outcome. Good luck!