An AVR Studio developer primarily works with Atmel's AVR Studio , an integrated development environment (IDE) for developing applications on AVR microcontrollers. They write, debug, and test embedded C or assembly code, leveraging the platform's built-in simulator for AVR microcontrollers. They also design and implement firmware, manage project builds, and use the in-system programmer for deploying the firmware onto hardware. In addition, they may work with external peripherals, handle interrupts, and optimize code for power and memory efficiency. They're expected to understand microcontroller architecture and be proficient in low-level programming.