eCommerce Portal (opensource)

Dears, We have a project for open source online shopping portal, and we need a solid experienced freelancer/team to take care of putting all pieces together. Most of our requirements below is covered by free plugins/extensions although we are willing to purchase any extension if it suits best. A list of developed shopping portals is recommended We are seeking one of the top open sources products such as Open Cart or Magento (or you may suggest a better solution) Our target is to make a portal similar to [login to view URL] , below is the main features that should be there: • Multi-language, Arabic (RTL) and English • Web 2.0/3.0 based portal, Ajax and simple design is required • SEO custom URLs • Mailchimp integration • Item Quick preview • 1 step Quick registration • quick checkout • Multiple types of Payments (PayPal, Credit, CashU card and COD) • Slider filters by price, maker, size, color, category... etc. • Item page should be containing a youtube video preview • Ajax auto fill search • Customizable homepage with multiple images sizes • Recently Viewed items • "Users also bought" Module • Social media integration, FB and Twitter sharer (addthis) • Login/registration with FB • Meta keywords configuration per each item/category • Mobile/Tablet site • Most viewed products • Hover images zoom, pretty image gallery • Lazy image loader • Customizable Menu • Best Seller • Support Ticketing system (within portal) This will be an ongoing project; we are seeking member/team to be willing to provide support afterwards. There might be slight addition on requirements, a requirement gathering session will be conducted to be agreed on Thanks in advanced