During my last year in uni I found an opening on their jobs page and decided to apply. The process started with a short email explaining why I think I'm a good fit for the job. After that I was added to a GitHub organization for supportocat tryouts. There were 5 support issues and I had to answer each to the best of my abilities. I then went through a Google Hangout screening where two "senior" supportocats chatted with me. In the end I was told I did well but the offer went to someone with more experience. I'm not sure if you would continue to on-site interviews like how potential developers do. Overall, it was one of the most comfortable interview processes I've been through and I was glad I gave it a shot. They did a great job of making me not feel stressed and anxious, which is what interviewing typically is for me.