To Develop a Ecommerce shopping cart platform for multiple websites, Exp 6 to 9 yrs PHP preferred

I need a Ecommerce shopping cart builder software ( not a Ecommerce website ) With this Ecommerce Platform shopping cart the store owners can create their online store and add/ manage products on their own. Companies or freelancers from South India are only Welcome.... Also manage themes, FB Store, logisitics / payment gateway integration. Color Customize around 30 themes, all the 30 themes are mobile responsive. 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 party opensource software. Only 6 to 9 Exp PHP $ CSS developers come forward.. Other options: website to support ,super admin for store owners control time frame : very minimum Only 6 to 9 Exp PHP developers come forward Skype me: shivadhanu40 Only those who can start the project soon,understood the project well and finish the project in limited time frame come forward.