PMS - Interface development to booking.com API

We are searching for a developer with experience and knowledge of the [login to view URL] XML API. We are running a Property Management System and require the development of an interface to exchange property data, pricing rules and bookings. All required information of each property is stored in a MySQL database. The interface shall be developed in PHP. The program must generate the correct xml data as specified for a list of multiple properties and send it to a remote server. The program must be able to accept incoming requests containing XML data in the specified format and save it to the local database. No user interface development is required. All specifications and documentations of the interface will be provided.