Looking for a programmer with experience with Unity

Hello, we are looking for a backend programmer who has experience with Unity and Playfab to help setup a content management system and integrate Paypal subscription using Paypal API. This is a one time job.

Requirements:
1. Has experience using Repositories(Github, bitbucket, sourcetree).
2. Has experience working with Unity with Playfab Integration.
3. Has Experience with Playfab payment via Paypal.
4. Has experience with actual backend programming such as MYSQL, PHP.