Redesign an opencart website and add more features to the website

Our platform allows anyone to browse, view, and purchase products from TOP e-commerce websites in China. All product information is available in English, western-oriented products are easy to find, and foreign-friendly payments are accepted. We are a team of 27 people. We have already built the core technology, and are looking for talented and dedicated people who share our vision. We are looking for a top-notch, driven web developer and front-end engineer to deliver, maintain, and refine dynamic, multi-platform, experiences as well as work on making our site responsive. The ideal candidate/company is an experienced Front-End Engineer as well as a technology enthusiast with exceptional CSS/Javascript skills and comes from an Agile environment, with the patience and communication skills necessary to work with and assist end users worldwide. Solid knowledge of HTML, CSS3, and Javascript is critical. Please note that you must provide a portfolio. The individual/company should work with us, as if they are part of our website development team. This will be an ongoing project. We are looking for companies who have at least 4 years of experience in open cart development. Currently, we have 200+ task waiting to be finished. JOB RESPONSIBILITY: Develop new plugins. Modify and install open cart plugins according to our requirements. Redesign the website template. Localisation of website according to the targeted country. Technical Qualifications: The person must have knowledge about API integrations. Detailed knowledge of and experience with complex HTML5, CSS3, and Javascript, including modern techniques like responsive design and continuous integration Experience working with emerging libraries/frameworks/tools such as jQuery, Backbone, Lodash, Modernizer, RequireJS, Less, Sass, and OpenGraph Ability to evaluate source code of third party libraries to gain deeper understanding about their strengths, weaknesses and suitability for a given task. Experience working with software teams, especially with use of code versioning software, like svn and git. Familiarity with PHP and SQL, as you may occasionally interact with other parts of the application stack Basic familiarity with the UNIX/Linux command line Experience with caching systems (memcache, reds, akamai, etc) is a plus Experience with reporting systems (like Omniture) is a plus Experience working with high volume web sites, media companies is a plus Future Work: Mobile Apps Development CRM Development