Q:

Intellij IDEA: How to enable TypeScript development for node apps?

I've read as much info as I could, be I still get error TS2304: Cannot find name 'require'. What else do I have to do to be able to develop for node.js in IDEA with TypeScript?

A:

What else do I have to do to be able to develop for node.js in IDEA with TypeScript

The reference you added is only valid to give you type information for JavaScript projects. For TypeScript you need to explicitly have node.d.ts in your project and properly /// <referenceed. 
you can get node.d.ts from TSD https://github.com/DefinitelyTyped/tsd tsd install node

