Fix Google Penalty

I have a website that has a google penalty. I have tried a reconsideration request and received the standard response that my site violates the quality guidelines and that i need to fix the issue. I need someone with experience in google penalty issues to troubleshoot the problem and fix it so that i can resubmit the site and have the penalty removed. Just respond to me that you are interested in this project and i will send you the site url. You can then see if you can fix it and give me a bid. Note: I will only agree to pay you the requested amount if you are successful in have the penalty removed.