I reached out to them on the internet. Their recruiter had to reschedule the first phone screen and it was a pretty normal call except that he asked illegal questions like "are you married" or "do you have family". Then I was scheduled a call with the CTO. The CTO failed to call and ultimately called like an hour after the scheduled time and nobody told me until I reached out to the recruiter so I just wasted an hour waiting. The call with CTO was pretty basic and he was more interested talking about himself than to get to know me. I had to reach out to them 2 weeks later to be told they would pass. Very unprofessional. Too bad, they have an interesting product.

There were 3 interviews in total: team lead, CTO, CEO. All via Skype. The interview with team lead was the longest, it took 2 hours. He asked me all kinds of questions: technologies, algorithms, programing languages, best practices, etc. It was more boring than hard, I goggled most of the answers on my iPad. The other two interviews were short 15-20 min. No hard questions just a smalltalk.