API PHP Development

I need a very advanced developer to create ~17 PHP API endpoints. I have full extensive documentation that explains all calls and what the endpoints should be. Server authentication will need to be setup also. There is just a few very simple math calculations that will be needed. For an experienced PHP Dev, this should be very easy with the documentation and database structure. You must be very experienced in PHP, REST standards, API's, etc. Please also show some previous similar work also.