Highly experienced Pro to review program code

Hello, We have a Web programming team that has developed a web 2.0 collaboration website for businesses and we are at a stage that we want to make sure it has been developed properly. We need a highly experienced software architect type of expert who has developed similar large interactive websites who could review our code, confirm the architecture is right and scalable, recommend the most efficient structure and suggest enhancements to the code. You must have expertise in PHP, Ajax based, Javascript, to be able to do the work. Please let us know your portfolio. The deliverable would be a written report and we would like to be able to communicate via skype and/or telephone. Thank you!