Magento expert for ecommerce project (pre-sales-step)

We are looking for a Magento expert (skilled programmer, the design will be done by ourself) to implement the following features (more detailed specs will be written if we get the deal). We are in a pre-sales step and will need some input about the Magento environment. Based upon Magento,the website will be multilingual and will sell B2C electronic equipment. Key features and functionalities of the site to achieve: - Website in 5 languages: English, French, Spanish, Italian, Arabic. The provider should provide translations of the site via a partner specialized in translation. - Catalogue including about 4,000 products. - Search by keyword, category, - ECart, order and payment online - Presentation of products, images, specifications. - Templates management for page editing and others (Prices, Spec, etc.). - Ability to protect pages by login and password - Display news - View promotions - Online Help - Online poll - Customer Suggestions - FAQ - Search engine on each pages - Link to send an email to a friend. - Ability to print pages and products descriptions - Display the ecart on every page and edit it. - Ability to save the basket for a few days. - Displays product images and product specs - Possibility of subscription to a privilege account. - Create customer account with delivery location and person recovering the product. - Matrix showing the shipping costs and delivery transport for each product and destination. - Definition of the delivery address and the person to recover the product Back office: - View the status of orders and purchases (validated or not). - Consultation of unfilled orders. - Space management clients. - Manage multiple e-billing or shipping addresses. - Storing information when creating an account. - Information on the average amount of purchases by customers. - Access from anywhere with a connected PC Back office customers: - Follow the customer clicks (duration, number of clics, lost, origin, etc.). - Management of suggestions and variations - Retrieve a list of customers via multi-criteria choice - Statistics on search term customers - Customer data linked to each order - Ability to allocate a discount to each customer, by product (in amount and in %) - analytics tool Back office Suppliers: - Receive Offers and Discounts. - Alerts for management of stocks, missing products or too low or too high stock level - Warnings for the suppliers and for the buyers too (products availability) - Link to products supplier (to define) - Import of products data sheets - Management of purchasing - Statistics - Ability to make a product invisible or unavailable - Suppliers data and user manual - Create products in advance with an availability at a specific date Back office for deliveries - Calculating shipping costs. - Order tracking in real time - Tracking of the order and package tracking - Data delivery locations - Alert for product management missing or too low or too high stocks level - Inventory Management - Warnings for the suppliers and buyers concerning product availability - Link product supplier - Multi criteria search - Statistics Back office for finance: - Management of taxes (VAT, etc.). - Currency Management - Payment to Banks (needs to be precised) Advertising, affilitated programs, Google adwords ... - referrers - various Statistics