SEO for Childrens Shoes Website (Opencart experience)

We require SEO for a childrens shoe website. You MUST have proven experience in doing SEO for websites based on Opencart software. DO NOT RESPOND to this listing if you have not worked on sites built on Opencart. We require the website to be optimised, articles being submitted, and HIGH QUALITY linking. The current website is: [login to view URL], but this will be changing to a new company name and URL (which requires the SEO work). If this is successfull, there will be a second website requireing exactly the same work. Many thanks