X-Cart and Ajax Programmer Required

I manage an X-Cart website which has been heavily modified, including a custom built (using Ajax and PHP) Admin page for taking phone orders and editing existing orders. The site has been live for 12 months and is running successfully. But we require some modifications and updates, as well as on-going support. Criteria required are: * solid knowledge of X-Cart, pHp and mySQL * provide at least 2 working examples of X-Cart sites you have worked on (references will be checked) * ability to work with Ajax code