PHP Project / Fix Bugs / Dynamic Meta Tags

Hi. I have a working ecommerce site (custom, not joomla/drupal), all scripts, everything, but I have a few problems. And I need a person who is an expert, will get the job done, and get it done right the first time. I am tired of people not completing the project. Things need to be done: 1. Website loads products inefficiently, need to make site load fast, and make scripts work efficiently. 2. I have meta tags in database for every product, but need to make it so that they display it for every page. You will have to make that happen. 3. Make my "facebook share" button work correctly on product pages. This is a remodel job. You would have to go into site scripts, and fix/remodel so it works correctly. In addition to this, there may be extra minor things, which I can pay as an addition that we agree upon. Serious developers only. I pay, and expect things to get done correctly and on time. I will provide scripts, and ftp where you can work on live.