Developer Web Services for API

We are seeking to develop a range of web services to allow integration of [login to view URL] with various desktop, mobile and web based CRM systems. To facilitate this interaction, a range of data formats will ultimately need to be supported, and the scope of the API is expected to grow over time. Your role will be to complete the initial API design and development, and to provide full documentation and sample test scripts for use by 3rd party integrators. You must have proven experience on working with high-volume, high-transactional, quality websites and the design and development of RESTful API's in a LAMP environment. You should also have experience working with a variety of data formats, including JSON, JSONP, XML and SOAP and basic text file formats such as vCard or csv.