A Keil RTOS (Real-Time Operating System) developer designs, codes, and debugs real-time embedded software using the Keil development environment. They're responsible for creating multitasking applications, managing tasks, inter-task communication, and synchronization. They work with memory management and event handling, ensuring system responses are immediate and accurate. Their role includes handling system resources, ensuring system reliability, and maintaining data integrity. They also integrate and test software components, troubleshoot issues, and optimize system performance. They collaborate with other team members and stakeholders to meet project specifications and deadlines. Continuous learning to stay updated with the latest RTOS developments is also part of their role.