Rest Api integration with trade gecko -- 2

I need a developer to do the following for my company. We sell through Takealot which is a marketplace type website and need the sales/inventory to sync with (1) Shopify and (2) Trade Gecko (our inventory management system). We need the marketplace API to get the inventory management system to record the sale and update inventory levels on the marketplace. Please see the capabilities of the API from the marketplace: The Seller API can currently be used to: Retrieve Seller current Product Offer information (selling price, RRP, leadtime days, leadtime SoH and status) using the Get an Offer or Get Offers endpoint Add Product Offers to a Seller Account for products that already exist in Takealot's Catalogue using the Create an Offer endpoint - the product's GTIN (manufacturer barcode appearing on the product/packaging) is needed to match the product to Takealot's existing catalogue Update Seller Product Offer information using the Update an Offer endpoint All of the above can also be done in bulk by creating a batch using the Create a Batch endpoint - please note: if there is a GTIN in the batch for a product that the Seller does not yet have a Product Offer for, a Product Offer will be created for the seller (i.e. batches can be used for Product Offer creation and updates) Retrieve sales information I have the API documentation for both the marketplace as well as for Trade Gecko which I will send to you. The API for Tradegecko is Json based Ideally I would then like to package this as an app and list it on TradeGecko apps for marketplaces and the Shopify app storefront. Please let me know what other information you need