You're right, we probably ought to mention that in the description, regardless of how long the Angular team will be supporting 1.x. Sending that feedback to the content team.
ETA: http://www.codecademy.com/learn/learn-angularjs
"Learn how to build web apps using AngularJS 1.x. By the end of the course, you'll be able to use AngularJS to create powerful apps of your own."
React is indeed agnostic to your server-side stack. Only thing is you'll need a node.js server if you want server-side rendering. (Codecademy runs ours separately from the rails app so we can do server side rendering.)
Codecademy. New York City (NYC).
Looking for full-time software engineers.
Codecademy is a coding education startup based in NYC, focusing on teaching users the programming skills they need to get jobs. We currently have 24+ million users and a team of 19 total (7 engineers), and use a mix of Golang, Ruby, & Javascript (React.js).
If you're interested, we can do an informational coffee chat sort of thing or just start the interview process, so let us know.