APPLE INC has the following available in Cupertino, California and various unanticipated locations throughout the USA. Develop boot and driver code for Apple SOC, including AP clusters, IO Co-Processor system, fabric, power management, memory, and other l/O devices. Design, implement, and enhance Common Firmware Environment (CFE) and other platform software including RTOS for Apple silicon validation organization. Develop system software to exercise power-saving features (suspend and resume). Contribute to SDRAM initialization and calibration development. Implementing firmware driver for PMIC and battery charging. Participate in the chip bring-up on the simulator, emulation, FPGA, and silicon. Develop applications covering system-level use cases and functional features. Participate in SOC architecture, design specification, and board schematics review. Develop test scripts in Tcl and Python to facilitate debug and test automation. Execute system level regression, sanity and automated tests.