572100 Joomla Extension Customisation

I am seeking an highly competent PHP/Joomla developer to customise a Joomla extensive. The work involves editing the layout of field elements and adding more interactivity so as collapseable inputs. In addition, I have an extension that has a couple of bugs that need fixing and small feature such as adding ability to enter/update company info in a subcomponent. You must have extensive PHP, Joomla CSS, and all round web programming application skills includinh Jquery, Ajax and Javascript. Please bid initially your hourly rate. Further work may be agreed on fixed price basis per task.