Some magento design and development... and QA, testing, etc.

We are building an ecommerce store with magento ce. it is for an online grocery store. we have a theme already and the cms content has been made, so most of design is taken care of. some minor design work will be necessary. You will be working closely with our manager to ensure reliability, security, and ease of use. You will assure the reliability of the website through proper configuration based on our needs, including local taxes, and taxable goods. We will require mainly programming and customization, so PHP and other web languages (html, css, js, ajax ) are required. You MUST have previous Magento experience , and must provide portfolio of Magento sites you have developed for. We might need custom module developed such as shipping and payment. Please note this will be the first of many projects using the same magento site, so extendability is our main focus. I will provide link to project site.