Find facebook integration expert -- 4

I am going to build a facebook mesenger center using Node.js.
I want to subscribe pages to a facebook app.
- If you click "Connect to facebook", facebook login popup will be shown.
- Enter credentials, then you can see the facebook pages,
- If you click one of pages, and click okay, then node.js app should be received messages from that page.
I am going to hire ASAP, so if you have experience in that part, please PM.