An I/O Virtualization Developer designs and develops systems that abstract input/output operations for various devices in a virtualized environment. They create software layers that allow multiple operating systems to interact with hardware in a seamless manner. Their work involves managing virtual machine (VM) resources, optimizing performance and security of VMs, and troubleshooting any issues related to I/O virtualization. They collaborate with system architects and software engineers to integrate I/O virtualization into overall system design. They also need to stay updated with the latest trends in virtualization technologies to improve system efficiency and performance.