BILAL A.

Senior Embedded Firmware & IoT Engineer | Matter Certified | 12+ Years I help companies ship production-ready IoT devices faster, with confidence, and ready for certification. With 12+ years in embedded firmware and IoT, I've delivered firmware for 10+ Matter-certified products over the past 3 years: smart locks, lighting systems, smart plugs, EV chargers, energy management devices, contact sensors, and window coverings. I know the Matter certification process end-to-end from harness testing to interoperability and I've shipped on both Matter over Thread and Matter over Wi-Fi. My work covers the full product lifecycle: hardware bring-up, custom bootloaders, RTOS firmware, OTA updates, cloud connectivity (AWS IoT, Azure IoT), and large-scale deployment. I build both end devices and IoT gateways used in real commercial products. Core Expertise: ✅ Matter over Thread & Wi-Fi end devices and gateways (RGB lights, door locks, sensors, window coverings, plugs, EV chargers) ✅ IoT Gateway design with Z-Wave, Zigbee, BLE Mesh, Matter & Thread Nordic, Espressif, Silicon Labs chipsets ✅ IoT Gateway connectivity over LTE and Wi-Fi ✅ Embedded Linux firmware with Yocto, Buildroot & OpenWrt ✅ OpenThread Border Router on ESP32 and Raspberry Pi ✅ OTA firmware — Thread, Matter, Z-Wave, BLE Mesh, Zigbee, and bare metal devices ✅ Custom bootloader design for Linux and bare metal embedded devices (U-Boot, MCUboot) ✅ Secure Boot, Flash Encryption, and TrustZone-based security ✅ Real-time OSs: FreeRTOS, Zephyr, mbed OS, CMSIS ✅ Low-power optimization — nRF52, ESP32, STM32, Silicon Labs ✅ Linux device drivers development (character, platform, SPI/I2C/UART drivers) ✅ Linux kernel porting, configuration, and BSP bring-up for custom hardware ✅ Device Tree (DTS) configuration and customization ✅ Video streaming & recording with GStreamer, AWS WebRTC ✅ Cloud connectivity AWS IoT Core and Azure IoT Core ✅ MQTT, CoAP, HTTP/HTTPS, WebSocket protocol implementation ✅ Automotive CAN — keypads, displays, touch panels, switching products (ESP32, nRF52840) ✅ Embedded GUI: Qt, LVGL, uGFX ✅ Wired protocols: UART, I2C, SPI, I2S, SDIO, USB, Ethernet ✅ Wireless protocols: BLE, BLE Mesh, Wi-Fi, Thread, Zigbee, Z-Wave, LTE-M, NB-IoT, LoRa ✅ Hardware bring-up, schematic review, and debugging with JTAG/SWD/logic analyzers ✅ CI/CD pipeline setup for embedded projects (GitHub Actions, Jenkins, west, CMake) ✅ Inter-processor communication (IPC, RPMsg, shared memory) on multi-core SoCs ✅ File systems for embedded Linux: ext4, UBIFS, JFFS2, SquashFS, overlayfs ✅ Containerization on embedded Linux — Docker, balenaOS ✅ Memory management, heap optimization, and stack profiling on constrained devices ✅ Unit testing and HIL (Hardware-in-the-Loop) testing for firmware ✅ Power management subsystems — suspend/resume, tickless idle, sleep modes ✅ Modbus RTU/TCP protocol implementation for industrial IoT applications ✅ Edge computing and local inference with TensorFlow Lite on microcontrollers Platforms: nRF52840, nRF5340, nRF9151, nRF7002, ESP32, ESP32-C3/C6/S3/H2, EFR32xG24, EFR32xG22, BG95, BG22, BGM220, STM32, Z-Wave 800, Raspberry Pi, Raspberry Pi Pico W, Beaglebone, Quectel SC20/SC206E, PIC16/18, dsPIC, TM4C123 Languages & Tools: C/C++, Python, Shell scripting · ESP-IDF, nRF Connect SDK, Simplicity Studio, STM32CubeIDE, Zephyr, MPLAB, Keil, Segger, Arduino IDE, Node-RED, GDB, Wireshark, SEGGER SystemView If you're building an IoT product and need an engineer who understands real-time constraints, wireless protocols, low-power design, and certification requirements I can help you get there.