The process is fairly random. There was one technical style of interview, a "personality" interview with a random person from the company who has no knowledge of interview techniques and just asked random questions, as well as a interview with the manager, which, while informal, was actually the most important one. If you pass that gauntlet you come in a second time to speak with the CTO, but at that point all you have to do is not put your foot in your mouth and you're OK.