Hi,
Please come to chat so that we can have detail discussion also i want to suggest why not you go for custom coding instead of using ready made CMS like open-cart as they have many limitation.
.
We are the small IT company in India. We have huge experience and mastery in App and Web development, App and Web designing, backend, SEO/SMM cloud services, and enterprise solutions.
We have knowledge of Xcode IDE(Objective-C), Swift, Eclipse IDE, IONIC framework, Android SDK, ADT Plugin, Java Programming, JSON, XML, Utility APIs, MySQL and SQL server database, super level UI design and much more.
Please come to chat for further discussion, we can start immediately.
Best Regards