PHP Specialist Needed to Start Right Away

We are a small business marketplace platform integrating multiple systems in PHP. We are seeking someone with extensive experience with testing tools in support of integrated applications involving PHP, javascript, and My SQL. Our multiple applications include CRM, forums, and an integration layer which links the open source modules together. In addition, our site has customized these off-the-shelf applications We require the expertise of a PHP developer with extensive experience ecommerce systems (specifically osCommerce), payment gateways and javascript. Our site has implemented many customizations to osC for our use and requires the assistance of a developer deeply skilled with osC, and also skilled at understanding integrated code and plan the integration of our enhancements. Immediate Tasks: - bug fix work to be completed - webmail / CRM