Nizar Naouali

I’m an Embedded Systems Engineer with ~5 years of experience designing, debugging, and validating firmware for Cortex‑M microcontrollers in industrial and smart‑metering products. I focus on low‑level C development, communication stacks, and system debugging where reliability and production constraints matter.

At Sagemcom, I debugged and validated embedded C development for C/C++ HDLC communication layers on ARM Cortex‑M‑based smart meters. I tested and analyzed NB‑IoT, LTE, GPRS, MODBUS, and DLMS/COSEM protocol behavior on production firmware, and I implemented RS485 multidrop communication between master gateways and multiple ESM slave devices with hardware‑software integration.

I also implemented and debugged DMA drivers to optimize RS485 multidrop communication, investigated firmware upgrade failures, and supported reliability improvements for field‑deployed devices. I collaborated with system and validation teams using Git‑based workflows to keep changes traceable and testable.

Earlier at Wattnow, I developed STM32 HAL‑based drivers and reusable libraries for the AD74413R, implemented low‑level communication using SPI/I2C/UART, and optimized ModBus protocol communication with DMA. I’ve also built firmware validation and delivery automation—setting up Jenkins CI/CD pipelines—and I bring Linux and DevOps background to improve system integration and robustness.