PayPal Plus module for WHMCS

We need a programmer with experience on WHMCS to develop a module to integrate PayPal Plus v3. The requirements for the module will be the following: - The module will need to be compatible with WHMCS version 5.2.7. - You module will take all the client personal information from WHMCS, and will ask on PayPal payment selection page, just the credit card info (as seen on the attached image PayPal_Plus_Payment_Selection_Page) - The "Pay Now" button shown on the HTML invoice should use the same CSS styles that my current Stripe module (I will provide you the stripe module files, they are not encoded). - After the user clicks on that button, the module will show PayPal Plus Payment selection page in a mini browser (not iframe). - For that mini browser window, you will also need to use the CSS styles from my Stripe module, as seen on the attached image (Stripe_Mini_Browser_Window), for the elements where it is possible. - The mini browser window should be responsive. I am attaching screenshots and PayPal Plus integration guide, so you can check it.