Write some Software

We have a Magento Online Shopping and we need somebody to write a Module. it needs to works as follows: Costumers will have a link to an external provider where they will select items and then this external website will make a POST request back to Magento to an specific URL and send XML data. This XML will have sku codes and numbers of items. The idea is that the module handles the request, process the XML and add all of the items in the XML to the Magento shopping cart based in the sku codes (sku codes need to be matched). Case 1: Users are in the online store (Magento) clicks the link to external provider, selects items, etc. External website send xml data back to magento and the shopping cart needs to be updated to add the items selected in external website. Case 2. Users are in the online store (Magento) then add some items to shopping cart, then they click to external website, select some items in external website, external website send back xml to Magento and the shopping carts needs to be updated to add these new items maintaining the ones already added. Only bid if you have done something similar and you are a Magento Expert