A BGP developer designs and implements Border Gateway Protocol, the protocol behind the global routing system of the internet. They create algorithms to determine the most efficient route for data transmission, handle network issues like congestion or outages, and ensure network security. They also manage BGP policy configurations, monitor BGP routing tables, and troubleshoot routing issues. Their work serves to optimize network performance and resolve connectivity problems. As part of their role, they may also collaborate with network engineers and IT teams to design and implement network architectures. Their expertise is crucial for maintaining the internet's reliability and speed.