An Microcontroller developer designs, programs, and integrates microcontrollers, a type of microprocessor used in automated devices. They write embedded software, often in assembly or C language, to control the microcontroller's operations. Tasks include interfacing with peripheral devices, debugging and testing software, and optimizing system performance. They need a deep understanding of the architecture, including its memory organization, I/O pins, timers/counters, serial communication ports, interrupt system, and instruction set. They also need to understand the specific application, such as robotics, appliances, or automotive systems, to ensure the microcontroller meets the product's functional requirements.