Greetings,
I have carefully reviewed your given attachment and can surely assist you in conducting modification in your existing open-cart system. I assure you that I will deliver you bug free solution as I have experience 5+ years and have expertise in below areas.
My experience with OpenCart
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--- Installation and configuration OpenCart development like custom development, creating e-commerce stores, Blogs, Forums, etc.
--- Create/modify custom templates, responsive themes; install/configure premium templates as per specifications
--- Integrate Payment Gateways
--- Custom modules/extensions development/modification and installation
--- Product categories, Sub categories, Filters, Sorting, and Quick search, user logins, etc.
--- Also, I'm well versed with MutiStore functionality and can configure and customize it
I would be obliged if you arrange an quick meeting with me so we can discuss the project in detail and hence raise my concerned queries as well. I hope for an affirmative response from your side.
Waiting for your response!
Warm Regards