I would like to hire a Software Developer

A new innovation, the Stranded Passenger Tool (SPT), is already implemented on a Wordpress based website for an international airport. I am a web designer in my own right and own the concept for this platform and put it together myself. I have been asked to provide some additional functionality which involves 2 WP plug-ins, namely, "Email Users" and the WP "Posts". We need to be able to send an alert to numerous recipients (already within Email Users) at the press of a "Red Button" which does not exist at the moment. The alert Template exists as a WP Post. The template to send would be standard and established text, however, we would also need to have the option to add a "Subject" line. While the pressing of the Red Button would generate the mail (Template) to a number of predefined recipients there should also be an option to add additional recipients. A fully functional and duplicate "Demo" version of the installation is available on www.avpers.com. You may click on the main menu "Stranded Passenger Solution" where you will be able to enter the Demo system with the appropriate log-ins. I would like to enlist the help of a PHP software developer to assist with this enhancement. Please get back to me with a first quotation or request for further information. Many thanks and kind regards, Robin