title: ExpressJS as an Orchestration layer?
body: <p>How would one use ExpressJS as an orchestration layer?</p>
  
  <p>I have five NodeJS / ExpressJS "API applications" for different business functions (security, human resources, asset management, fleet management, etc.).  Each provides raw object / document APIs and has its own database, app server, routes, etc..  I would like to build ANOTHER ExpressJS application to sit IN FRONT OF those five "stacks" and provide higher-level business operations (ie, TerminateEmployee, etc.) by funneling multiple calls into the other five stacks via REST.</p>
  
  <p>Am I insane?  Is this common?  Maybe I don't know what to search for, but I'm not finding any examples of doing this.</p>
  
  <p>BTW: I'm also thinking of building highly-reusable "widgets" (basically, individual AngularJS services and UI elements) to call into that sixth front-end stack.</p>