Freelancer needed for FM/PHP/JQ Project

We are getting ready to launch a large web based project and need some help getting across the finish line. There will be some light work to be done on the FM database, but the primary dev will be on the JQuery/PHP frontend. It will be on a contract basis now, but if the launch goes as expected there is massive room for growth in the company going forward. There is plenty to be done, but specifically I need a few "modules" if you will, to be looked at with a fresh pair of eyes. Specifically, I need to work out some bugs with my authentication system and handling session variables. It is working, but I have a few bugs that are rearing their ugly heads. I am definitely open to a complete rewrite and creating a custom session handler, Also, I need to integrate with a few external systems, namely shipping and address providers.

Please private message me with your hourly rates & experience. You must be willing to sign a NDA before viewing the project.