The dashboard is all backbone, the backend is all node.js.
We wanted to build something that could become a core toolset for all developers. Hopefully it'll help frontend developers with e-commerce sites, but I'm excited to get to use it myself.
Started as a joke among my dev team and we've now sold a few shirts and plan on developing the idea.
Javascript: Just jQuery.
The backend is Java on Google App Engine. Restful.
We make extensive use of Knockout and Backbone; the backend is ASP.NET MVC4/WebAPI.
Completely 100% client-side JavaScript. Possibly makes heavier use (abuse?) of IndexedDB than any other website.
I liked the UI. Clean and simple.
Adding a line or two about what the site does may help.
Best wishes.