You will be working with the Clover and WHMCS API, so we can complete functions on our WHMCS install. The Clover will act as the credit card terminal, and needs to update WHMCS when a invoice is paid, refunded, partial refund, cancelled order, etc.
We have an existing POS module in WHMCS already that would simply need the Clover integration.
The Clover API documentation is here:[url removed, login to view]
To complete this task, you must at least be familiar with APIs, WHMCS and its functions, and have an understand of point of sale terminals such as Clover.