modifications to a penny auction site

Hello, we are looking for a PHP, MySQL and Ajax developer or programmer do this job. basically, we have a penny auction site and we need to integrate new futures and changes. We are looking for an expert at this kind of job. In addition, we prefer to hire an independent freelancer over a freelancer working in a company. our budget and time are limited. Please if you and you feel qualified for this kind of work, go ahead and start BIDDING. Please take a look at the attachment and Contact us for further details.