A KVM (Kernel-based Virtual Machine) developer designs, implements, and maintains the KVM hypervisor, a tool that allows running multiple virtual machines on a single hardware host. They work on kernel space and user space, improving performance, security, and stability. They handle bug fixes, software updates, and new feature development. They collaborate with other developers, system engineers, and customers to understand needs, troubleshoot issues, and deliver effective virtualization solutions. Knowledge of Linux kernel internals, programming languages like C, and a deep understanding of computer architecture are essential for this role.