Experienced RF & STM32 Consultant Needed for Custom Embedded Device Development

We are developing a custom electronic device that integrates RF communication, STM32 microcontrollers, sensors, power management, and other embedded hardware components. We are looking for an experienced... (Budget: $30 - $250 USD, Jobs: Circuit Design, Debugging, Electrical Engineering, Electronics, Embedded Systems, PCB Layout, Product Development, STM32)