Coder Needed for Long-Term Work

I am looking for a coder who will be available on SHORT NOTICE to complete/modify existing code and complete new projects as needed. Pay will be determined on a per-project basis (approximately equivalent to $8/hr). Applicant must be available to begin work within 1 day of agreement on price. I will need approximately 20 hours of coding per month on AVERAGE (some months more, some less). Agreed price will be FINAL. Any attempt to increase price mid-project will result in no further pay and immediate termination of any and all previous agreements. In-depth knowledge and experience required in PHP/MySQL as well as AJAX and CSS. Must be skilled at reading and modifying existing PHP code. Other technologies/skills are not required, but a bonus: 1. Good graphic/web design skills *** IMPORTANT 2. Python 3. RoR 4. PERL *** Please no "teams" or "companies" - I am looking for a SINGLE coder that I can develop a close, direct, working relationship with over time.