Required software development freelancer for WHMCS integration with my bash script job

I set up WHMCS on my own VPS. I also create a bash script that can create a new server on my could provider and install the OpenVPN server on that.
You have to create some PHP script and connect it to my whmcs. it reads the username from the client area and location from the product list and sends those to my bash script.
my bash script downloads the OpenVPN profile, you have to put it somewhere in the client area then the customer can download it and other users don't allow to download it. I also have two other bash scripts that stop the server and delete it for suspending and Terminating the servers.

My bash script got 2 variable:
1- the username
2- the location

I can edit my bash script but I don't know PHP.
Another thing that I need is to set up a credit card gateway for payment options. I just have a PayPal account. you have to signup and verify the account in any provider then connect it to my PayPal account.

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Skills & Expertise Required

software development