Client Portal to HTML5 Web Page on WordPress Website

I own a digital signage company and am trying to develop a template based approach to creating digital signage content for my clients. Current digital signage software supports the use of XML and HTML5 for content. I am looking for a simple and powerful way for my clients to log onto my website, access their account and create dynamic digital signage content based on a few text fields and an image. I am looking for someone to help me create software that will allow my clients to access their data from my wordpress website. As I am a FileMaker developer, I am interested in using FileMaker Pro as the back-end database. Currently I have a FileMaker database that can create an XML file based on (3) three text fields and (1) one image that populates a digital signage template. I would like to incorporate this into my WordPress website. In addition, digital signage now supports HTML5 web content so I am also interested in a way my clients text and image fields can be converted into an HTML5 webpage and displayed as digital signage content. The ideal freelancer would be someone experienced with WordPress, HTML5, CSS, JavaScript and FileMaker Pro. I have attached a very basic ad that consists of (4) four text fields and (1) one image. I am looking for someone to work with me to develop • a client login on my wordpress website • integrate filemaker database as back-en