Hello,
I have reviewed all provided details and wanted to confirm you that we have full understanding about your work scope and we have a great in-house team of designers as well as developers having more than 8+ years of experience in designing and developing large scale complex applications. And I can assure you to deliver you best results very near to your expectations.
As I have extensive experience with Wordpress, PHP, JIRA, MySQL, HTML5/CSS3/jQuery, I am also expert at theme development, plugin development, PSD to WordPress, customization of WP core for development of custom modules. And will surely help to rebuilt your existing eCommerce Multi vendor.
Regards,
Kaushal