Build an Online shopping store

Need to get a website ([login to view URL]) redesigned with mobile-first design approach. Rethink theme and layout for the site keeping in mind the catalog items and target audience. Get a mobile web version for the same which should be compatible with maximum phone models. Make the site more responsive. Enhance the product reviews and rating option. Have a better SEO for the site. Enhance facebook login integration. Enhance the custom cover designing feature. Admin features: add bulk messaging and emailing feature; ability to add discount coupons; have easy catalog maintenance. Bidders: please provide a portfolio of your work for reference. Experienced e-commerce website developers will be preferred.