Development of a system for API of MELI (MercadoLibre)

I need a system integrated with the API of Mercado Livre Brasil, here is the documentation of the API: [login to view URL], this system needs to be developed on Java using the MVC concept of programation, must use Maven to download the dependencies, need be online, hosted in a server near Sterlingm Virginia, USA, where is located the mercado-livre server. The system must have multi account capability (can be use several accounts). I need the following fuctions on the system: - Scan and store information for all advertisements created by the account(s). Create a daily Excel file including the following information: SKU code, title of the advertisement, category, HTML code of the description, price, variations, price of each variation, SKU code of each varation, url of the Picture of the variation, stock of each varation, size, number of item in stock, URL of the thumbnails (pictures), URL of the video, number of visits, number of sales, type of advertisements (Premium or Classic), type of shipping (paid shipping, free shipping throughout the country, free shipping except to the northern regions, option for personal withdrawal of purchase by customer our without personal withdrawal of purchase by curstomer, Type of Warranty, code of the advertisement (MLBxxxx), condition of the product (used or new), status of the advertisement (active, paused, or finalized), link to the advertisment., like this: [login to view URL] - Editting of Advertisement: Changes to the current advisement will be made within the Excel Spreadsheet -Publishing of advertisments: Publish advertisements through upload a excel spreadsheet with the same teamplate of the example above. Must have a row of advertisements to publish (each spreadsheet of excel must have a programed date to be uploaded and published their advertisements). Must have an place to put observarions of the spreadsheet on the system -Visitors generate: Visit the selected advertisements repeated times, generating milions of visits per day, visit the advertisements through different ips of proxy, it must have the option to visit only the selected advertisemnts that i will inform the link or code of the advertisement, all the advertisements with the informed SKU, all the advertisements of one category or all the advertisements of one account. - Generator of questions: Generate questions in the selected advertisements, will be registered in the system some accounts of mercado-livre that will be used for make the questions, each account must use always the same ip of proxy and port, must have the option to make questions only to the selected advertisements that i will inform the link or code of the advertisement, all the advertisements with the informed SKU, all the advertisements of one category or all the advertisements of one account. The system must permit register the questions and the answers. The system must reply automatically the question. The system must permit choose in wich hour and frequency of days the questions will be done. I need to have acess to the system while you are developing, after you finish each one of the fuctions i will acess the system and test the fuction while you develop the others fuctions. Before to develop the fuctions required the freelancer must provide an not working prototype just for see if you are going in the right way.