Hi, I am an experienced web developer and have worked with php as well as other related technologies (javascript, ajax, mysql, xml, html, webservices, Flex, Air, etc...).
I am fluent in English and Spanish and have experience working with an arrangement like the one you are proposing (work based on tasks, with constant updates and deadlines that requires good feedback form your programmer).
I believe that I can do what you are asking, but would like to discuss the project and the arrangements further, please PM me if you want more info about me or my experience or if you want to meet on skype.