I need a web designer to design my Magento cart

We have around 200 dealers buying about 10000 different products but the major sale is from 200 products that sell more often than others. i would like to hire someone to program my website enough that i already have a backend designed for adding new products and changing stock level and prices myself. user account creation, order history, etc needed. site visitor should be able to download his shopping cart as a pdf (in substitute for a quotation. also a button to request for an official discounted quotation for the items in the cart. link to already subscribed payment gateway and setup rules for tax percentage and shipping.