E-Commerce MongoDB Schema and NodeJS Backend with Integration with Quickbooks -- 2

We are building an e-commerce based application that we are looking for assistance for someone to build out a NodeJS backend with a MongoDB database. The front-end will be developed independently and will be cross platform. We are looking to work with someone on an hourly basis with regular check-ins and intervals. For this project we would like to do a check point every 20 hours. After a review of the work that was completed together we will release the 20 hours and then we will continue working on the next stage. Please identify in your message back how many hours you think the below may take and what experience you have with building similar applications. I am looking for someone to be able to start working on this immediately and dedicate time on this until completion so please be available if you are responding. The successful candidate we will be looking to engage on an ongoing basis. The following end user functionality must be covered in both the MongoDB schema and NodeJS route points: - Customer Company - Customer Contact (user) - Login and Security (including Registration) - Product - Product Review - Invoice Creation [and sync with Quickbooks Online via API] - Carts [Customer can have multiple carts, can share their carts, can abandon carts, add items, remove items, adjust qtys] - Checkout process (we use Stripe for processing) - Management of Payment Cards (on Stripe) from their subscription service Invoice Sync will require the following: a) Sync for Customer Data from MongoDB to Quickbooks b) Creation/Update Product Data from MongoDB to Quickbooks c) Sync Payment Information FROM Quickbooks to MongoDB