Modification of a PHP module for the link between the dolibarr ERP and the PrestaShop CMS

We are looking for a developer to modify a PHP module for the Dolibarr ERP + PrestaShop CMS. In order to answer various problems, our company wishes to improve its link module to answer the following elements: 1. PrestaShop - Dolibarr link: modification of a module to accept multi-currency and multiple VAT rates 2. Incremental synchronization of commands: the current module only offers webservices 3. Identification of different flows: our company works with flows from marketplaces (amazon, ebay ...) through ShoppingFeed. Our products are therefore stored in some marketplaces (ex: amazon FBA). Each stock must be decremented according to different sales. We are currently working with the CyberOffice module: - [login to view URL] #Currency: In the current state, the module only allows the synchronization of orders with Dolibarr's default currency. Dolibarr being multi-currencies since version 10, we want orders to go down with the different currencies in PrestaShop (USD, CAD, Euro and British Pound) #Taxes: Amazon requires to sell on its different marketplaces with the VAT rates of each country. Sales therefore go down in PrestaShop with different VAT rates. In the current state, the link module between PrestaShop and Dolibarr does not allow to manage the different rates of VAT and orders descend in Dolibarr with errors. #Synchronization: The module works on the principle of webservices. Our problem is that in case of webservices failure, it is currently impossible to create an incremental synchronization manually to import the missing commands. To work around this issue we want a manual and incremental update solution to be developed. #Stock / Flows: The management of our stock must exactly reflect the reality of the market. We have internal warehouses at our company but also warehouses defined on different marketplaces. Example: An Amazon FBA sale must be decremented from the Amazon stock and not from our internal stock. The schema is as follows: FBA amazon sale -> Ecommerce flow -> Prestashop -> Dolibarr -> Decrease the amazon stock in dolibarr All additional information will be provided upon acceptance of the contract.