MEAN folder structure

gistfile1.txt

/node_modules
/package.json
/src
  /node_modules
    /client -> ../client
    /server -> ../server
    /shared -> ../shared
  /client
    /apps
      /main
        /test
          main.spec.js
        index.js
    /modules
      /foo
        /test
          foo.spec.js
        index.js
  /server
    /apps
    /modules
  /shared

from any file in the src you can require("shared/foo") or require("client/modules/foo") and so on