Skill Sets :
Good in Embedded C
Electronics and Communications Engineering preferable.
Should have knowledge in protocol like UART, SPI , I2C , RS232.. etc
If they work in IOT device side are more preferable.
knowledge on RTOS preferable.
Good debugging skills.
Should have knowledge in cross compilation.
Should have knowledge on GIT repository.
Should have knowledge on RTOS
Experience on using communication protocols like UART, SPI, I2C, MODBUS. Should have experience in GSM, LORA, BLE, IR, RF.