Asset management tool in EXTJS framework

I have designed a asset management tool using the EXTJS framework and need an expert to build. JavaScript/ExtJS expert wanted. We are seeking an experienced JavaScript developer with extensive knowledge of the ExtJs framework who can provide help on an project basis. Responsibilities will include code and testing. The successful candidate will have a good command of written English language, evidence of prior work which demonstrates your command of ExtJs and experience. Please submit your hourly rate, a copy of your CV and the hours you are available to answer questions