PHP Website Changes

I have a website built in PHP and MySQL. Essentially the website works as follows: Artist's who sing and perform can enter their availability onto the website and then other users of the website with a log in can see what their availability is. It is not an easy website to explain but it is not a complicated website. I need a coder who is highly experienced in PHP/MySQL coding who can help me make some changes to the website. Once I feel I have found a suitable coder(s) I will provide full details of the project so that you can enter your bid so for now all I am looking at is: 1. Your previous work experience on vWorker (number of ratings and rating values) 2. Your experience working with PHP/MySQL 3. Your availability to start work on my project immediately In itself, this is not a big project, but I do have lots of work similar to this (as I am a web designer based in the UK that outsource all of my coding overseas).