WHMCS Payment Module for AstroPay

We need a developer with experience developing payment modules for WHMCS, to an integration with AstroPay Gateway. Check Documentation: [login to view URL] [login to view URL] Requirements: The module will be developed using Astropay “Direct Streamline API”. So there will not be a intermediate form after WHMS, where the client will need to enter his personal data again. The module will take the required client data form WHMCS and will send it to AstroPay, so the client will be sent directly to the payment page. You will need to develop not just one PHP files, but single PHP files for each of the following options: A. Modules for Brazil: A.1. Credit Cards (without installments): It will use AstroPay iFrame. So the client will not be redirected to other page. The credit card form will just ask the client the credit card info, will be responsive, and the style will my current WHMC template. A.2. Online Bank Transfer: This option will redirect the client to the bank page, where he will be able to make an online bank transference. A.4. Boleto Bancario: This is cash payment in Brazil. I the client selects this option, he will be sent directly to see the Boleto already created, where he will be to copy the Number, download it as PDF or print it. A.5. Boleto Bancario on Emails: You will provide another PHP file, that will be used on WHMCS Email templates, this file will take the invoice ID variable, and just using that variable will be able to take from WHMCS database all the required information (Client’s persona data, and invoice amount, etc) to take the customer directly to the page where he see the Boleto already created, to download it as a PDF or print it. You will use WHMCS AutoAuth feature, so the client will not be asked user credentials when clicking that link. B. México Module: B.1. Credit Cards (with installments): It will use AstroPay iFrame. So the client will not be redirected to other page. The credit card form will just ask the client the credit card info, will be responsive, and the style will my current WHMC template. This form will have a dropdown field where client will be able to select in how many installments he wants to pay. C. Call Back: You will develop the corresponding callback, so WHMCS will automatically mark as paid the invoices when AstroPay report a successful transaction.