Hi,
I have reviewed your requirement and we can do this job as per your needs that you have mentioned I would say you are at right place as we have huge experience and expertise in Plugins, Opencart , Angular.js ,API Integration ,Woocommerece,Php, .net, Magento, Word press, joomla etc all open source that we have builted more than 200 website in wordpress including theme and customized theme as well.
Please find portfolio here with.
I am waiting for your reply.
Regards
Rajiv Sharma