Developer Needed for Fedex API integration & Shipping Label Generation System

I already have full FedEx API credentials and documentation; what I do not have yet is the polished, user–friendly interface that lets staff pull live rates and print shipping labels in seconds. Here’s... (Budget: $20 - $50 USD, Jobs: API Development, API Integration, Backend Development, HTML, MySQL, PHP, React Native, Software Architecture, Software Development, Web Development)