Developer Needed for Launch Support

We are in the process of launching V. 1.0 of a new online community marketplace that is scheduled to go live in the next week. This is a shoe-string, start up venture comprised of just 3 people currently and as a result we want to have some additional support at launch to respond to technical inquires, bug fixes, and other development as needed. Prospective candidates should possess experience in as many of the following competencies: PHP Javascript MYSQL HTML CSS Feel free to apply even if you only have a subset of the above experiences. Just know that preference will be given to developers who have all of the above. Extra pluses include experience with Perl, AJAX, mobile platform development, and the Facebook and Google Maps APIs. We are only willing to work with developers in the U.S. and you MUST possess extensive prior, verifiable work experience. Further, the selected freelancer must be willing to sign an NDA (Confidentiality Agreement) and must be willing not to disclose our work as part of their portfolio (at this time). We see this as being a retainer based engagement based on the overall response probably not to exceed more than $250 following launch, however with a resulting good working relationship on this initial project we would be willing to retain the freelancer for ongoing maintenance, support, and further development as the business needs dictate.