Experienced front end and back end php developer

Looking for an experienced frond end and back end php developer to build B2B Marketplace business directory similar to SOARMART DOT COM Web developer must be experienced with PHP, MySQL, Javascript and have done any previous work related to business directory project. Please note we need a Rich Internet Web Marketplace that supports manufacturers, sellers can create their profile and submit products. Our main focus is to show their profile and products with seo friendly URL's and Sellers from any country can add their listing, so their location country with state will show on product listing and on their profile page too. Need two packages for sellers - Free and Premium Payment Gateway - Paypal & PayUMoney ! The website must be highly secure from any xss, csrf or any other attack. The URL's must be seo friendly mainly for products and sellers profile pages urls and titles. Need to develop website from scratch. I can provide the specification upon request.