I need an OpenCart developer familiar with Amazon Seller API

General information for the website: Sells vacuum and parts
Description of requirements/features: We are required to integrate our clients store with Amazon, specifically we need to be able to fetch new orders from Amazon and display these in the dashboard of the administration panel so that the details of the order can be opened and shipping labels can be generated, there will also be a need to update Amazon and process the order and mark it as shipped with the tracking number.

We dont need any UI work from the chosen developer, all we need is for the code to be written to pull orders from Amazon into a database table with all details possible, customer info, billing and shipping address etc. And mark those orders as processed. This script will run as a cron adding all new orders into the table and updating the current order status for previous orders already in the table.

Secondly we will then need another cron that will look at a table and pull that data for updating amazon with tracking number and mark is as shipped.

So all you will be doing is writing 2 crons to pull orders and update tracking, 2 tables will need to be created also entirely as you need as we will work from this, but obviously amazon order identifiers will be needed so we can link the two tables and so you can update the orders as required. You will need to tell us how to fill the data into the tracking table so it will work correctly.
Specific technologies required: amazon api, opencart
Extra notes: Please let me know if you have any questions