Need to Build a Ecommerce Shopping Cart,stock,themes customization,only 5 to 8 yrs Exp PHP Dev

Only 5 to 8 Exp PHP developers come forward.. I need a Ecommerce shopping cart ( not a Ecommerce website ) With this Ecommerce Platform shopping cart the store owners can create their online store and add products ,host it in as individual websites in our server space Reference: [login to view URL] Front End: store owners can select customize themes, customer login, payment gateway for their site, Email ,chat support integration Backend: Stock management ( add products) , order management,Domain linking,Logistics integration,google analytics, SEO for each store, It should be done in core PHP,with no wordpress or 3 rd support integrations. Other options: website to support ,super admin for store owners control Very minimum time frame is accepted, Only 5 to 7 Exp PHP developers come forward Other features : website to support, super admin to control store owner website and their customers.