An IP Subnetting Developer designs and implements strategies for IP subnetting, a technique used to divide a network into smaller, more manageable pieces, or subnets. They determine the most efficient way to segment the network, considering factors like size, data traffic, and security requirements. Their duties include assigning IP addresses to different subnets, ensuring efficient routing and network performance, resolving IP conflicts, and maintaining network stability. They also troubleshoot any subnet related issues and may work closely with network engineers to optimize the overall network infrastructure. Their work is crucial for scalable, efficient, and secure network systems.