FBR Digital Invoicing Platform

I need a developer to build a digital invoicing platform for my company that supports FBR compliance in Pakistan. The system should allow us to create, manage, and issue invoices, while ensuring all required fields and formats are properly handled. I’m looking for someone who can deliver a reliable, user-friendly solution that meets local tax and invoicing requirements. Using the official documentation API docs from FBR implement those in the webapp and make sure the API are well integrated and do not need manual changing every time there are changes by FBR the portal should not go down eveytime and should have solid error handling.