I'm Ragheed Al-midani, one of uMOOC's two co-founders. I met my co-founder, Dwayne Kennemore, when we were both in CS50 at Harvard Extension School. uMOOC was his idea (he will probably share his inspiration here shortly), and I offered to help. The first prototype of uMOOC was built as our final project for CS50, but the scope of the project has grown tremendously since then.
If you're wondering what our stack looks like, we're using (among other things) Python 3, Django, Django-Rest-Framework, Ember-CLI, Emblem, Sass (the original, indented version), Bootstrap, CoffeeScript, and EasyRTC.
If you have any questions or concerns, technical or otherwise, please don't hesitate to ask!