Customizing, Embedding and Enhancing of Wordpress Plugin and Site - repost

I am looking for a WordPress developer with skills in implementing / enhancing Plugins. I need someone who can support me in setting up the plugin Appointments+ from WPMUDev and enhancing the site and especially the plugin with custom functions (like e.g. front-end maintenance for user profiles, google maps distance filter etc.). Process flows and design will be provided upon request. Wordpress theme already installed and setup. Main goal of the site should be the following: Workers can easily create their own profiles (front-end maintenance required) and schedules / calendars within Plugin Appointments+. Website users can browse profiles (with different filters) book the different workers and pay via PayPal account. (the booking plugin i have already available, but I am looking for a WP Developer who can support me in enhancing the site with custom functions (programming).