趣味编程网站codecademy不错，即时互动。但不知道用什么开发的。在它的jobs栏目中，发现：
- Senior Developer
- We are looking for top-notch developers who not only get excited about tackling the novel interface, content, and big data problems related to online education, but who also want to be a defining part of a young company and product's DNA.
- Our stack:
- Backbone.js
- Ruby/Rails
- mongoDB
- We love macs, but we're not allergic to Linux systems
所以，网站使用的技术是Backbone.js并结合Ruby/Rails，后台使用的是mongo这个NOSQL数据库。这些人一般使用macs电脑，但不排斥Linux。
然后，搜一下Backbone.js嗯，是个比较复杂的js框架，Ruby&Rails我还不会，mongo也没学过，看来还有很远的路要走。
