The hiring/interview process was very quick and painless, taking less than three days from application to signing of my contract. There was a quick online application, a video interview, and a mostly-informational phone interview that was followed very quickly by a contract.

Interview on video of you teaching something, everything else was back and forth emails or online questions, you perform a profile for yourself. I think it's all very straight forward. If you want to sub-contract, its pretty self explanatory.