irmware engineer available for remote contract work. Short one-off tasks or longer milestone-based projects, both fine. What I build: Firmware — ESP32, STM32, nRF52, RP2040. C/C++, FreeRTOS, Zephyr, bare-metal when it's warranted. Connectivity — BLE (Nordic SoftDevice, Zephyr stack, ESP-IDF), Wi-Fi, LoRa / LoRaWAN, Matter, MQTT. Low-power design — taking sleep current from mA to µA. PPK2 measurements, wake-source auditing, peripheral gating, bootloader tweaks. Drivers — sensors and peripherals without good library support. I²C, SPI, UART, QSPI, I²S. Edge ML — quantized model deployment. TFLite Micro on MCUs, TFLite INT8 on SBCs like the Pi 4. Model shrinking, calibration, integration with real-time pipelines. ROS2 — custom nodes, nav2 tuning, SLAM integration, lifecycle management, DDS QoS. Recent projects: Autonomous exploration rover — ROS2 frontier planner with a U-Net map predictor, Cartographer SLAM, nav2. Writeup available.…