Hi,
my name is Oleksii. I can help you to develop a custom plugin/addon/module for you to use in the WHMCS backend.
I have 19 years' experience in Web Development. I would like propose partnership with our company Tangram for your project. My team is with strong knowledge of MySQL, PHP, Software Architecture, WHMCS, and XML. We can create custom modules and plugins, various web-applications, maintaining existing sites, debugging and resolving issues, proposing and implementing new functionality.
I am available to start working now. I'll be happy to chat with you to review your needs.
Looking forward to your response and wish you a great day ahead.