I wonder how that company pulled this one off. In my experience, UML diagrams end up either too shallow to be useful for code generation, or so dense that they're totally useless for communication with non-technical stakeholders.
I don't know the details so I couldn't say. I was surprised as well to be honest. I talked briefly with one of the owners, he did know quite in a deep way what he was talking about. A lot of emphasis for the process, using new technologies but without the 'madness' that we see usually in the Javascript world.
