Hi there,
According to my knowledge, you are having an E-Commerce website adding cart feature to buy online, Integrate payment gateways such as Paypal and credit card, auto response to the buyers via E-mail, you want to add, edit and delete the products also through back-end.
My area of expertise is Joomla, WordPress, Core PHP & Codeigniter, Laravel, Graphic Design, Website Design, HTML5, CSS etc.
I believe communication is the key to any successful project, I look forward to discussing your project with you.
Sincerely,
Gazala