Hi,
I have read your job carefully and I am interested in your job post for a web developer to customize an existing platform or develop entirely new applications for you. Any kind of modification can be done here. I have done several OPENCART based online store having lots of modification in pages like Product, category, Cart page etc. So it would not be a difficult thing here.
Please reply so I can start it ASAP.
Regards,
Sumanta Dey