An IBM Assembly Developer is responsible for writing and maintaining low-level, high-performance code using IBM Assembly language. They work directly with the system's hardware, creating software instructions to control specific hardware components. Their tasks include developing, debugging, testing, and optimizing assembly software, understanding hardware specifications, and interfacing with higher-level languages. They also develop algorithms that leverage hardware capabilities to improve system performance. Their role requires a deep understanding of computer architecture, memory management, and operating systems. Furthermore, they may also be involved in diagnosing and fixing software and hardware issues, ensuring smooth system operations.