A ChorusOS developer designs, develops, tests, and maintains software applications on the ChorusOS real-time operating system. They utilize their knowledge of real-time systems, microkernel architecture, and distributed systems to create efficient and robust applications. Their tasks include analyzing system requirements, writing code in languages like C or C++, troubleshooting issues, and optimizing performance. They can also be involved in system-level programming, including device drivers and kernel modifications. They work closely with other software engineers, system architects, and testers, ensuring the applications meet quality standards and client needs.