An Microcontroller developer designs, programs, and debugs systems using the microcontroller architecture. They write assembly level or embedded C programming code for microcontroller-based applications, ensuring efficient operation. They also develop hardware interfaces, perform software testing, and troubleshoot issues. They may also design and implement control algorithms and data acquisition processes. Their role involves understanding and meeting system requirements, collaborating with other engineers, and maintaining documentation of design processes. They must stay updated with advancements in microcontroller technology and apply this knowledge to improve existing systems or develop new applications.