Need developer who can sync Google Calendar with events in my site

I have a PHP scheduling program where people can see jobs available and then request them from the employer. The employer then confirms the person to work the job. I would like to get a script that will allow the person to then sync the confirmed job to his/her Google calendar. My program was written in PHP and uses My SQL database. I wrote the program and can work with the developer to implement the script to make Google calendar work.