This is the "big picture" view of our tech stack. We plan on writing more technical posts about how we work with ElasticSearch, Backbone.js, etc. in the future. Let us know if there are any particular areas you'd like to hear more about.
I'll write more about it soon. But overall using RequireJS modules. Generally one "class" (Model, Collection, or View) per .js file - though helper classes end up in the same file.
Have a different environment for dev vs. production to make dev easy and production fast. In dev handlebars templates are fetched/parsed on the fly. On production they are precompiled.
I really like that one - was considering purchasing it for a project. Granted, you guys modified it quite a bit. I'm also looking into close.io for my sales. : )