Skilled inC/C++for STM32 bare-metal andFreeRTOSdevelopment using CubeMX,HAL, and LL drivers . Strong inUART/DMAcommunication, interrupt handling, and serial data parsing with ring buffers. Experienced with Sequans LTE-M/NB-IoT modems,AT commandcontrol, andPSM/eDRX power tuning . Proficient indebuggingand power optimization usingST-LINK , SWO, and logic analyzers