Russell D.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Aug 28, 2026.

I design and deliver modern embedded systems and IoT products for wearables, industrial automation, healthcare devices, smart sensors, robotics, and connected hardware. As a senior embedded engineer, I help clients move from concept to prototype to production with clear architecture, reliable firmware, manufacturable hardware, and scalable connectivity. My focus is on building systems that are not only functional, but also robust, secure, maintainable, and ready for real-world use. My experience covers the full product stack, including electronics design, PCB layout, embedded firmware, RTOS, embedded Linux, wireless communication, cloud integration, GUI/HMI development, OTA updates, and manufacturing handoff. Technical Expertise: - Wearable devices: IMUs, biomedical sensors, BLE, low power design, battery systems - Healthcare devices: monitoring systems, data logging, secure connectivity - Industrial automation: CAN, RS485, Modbus, smart sensors, factory monitoring - Embedded firmware: ESP32, STM32, Nordic nRF52/nRF53, PIC, AVR, NXP, TI - Connectivity: BLE, BLE Mesh, Wi Fi, MQTT, LoRa, LTE/GSM, GPS, Sigfox - PCB design: schematic, layout, BOM, Gerbers, pick and place, DFM/DFA - Embedded Linux: Raspberry Pi, Yocto, Buildroot, BSPs, drivers - RTOS and bare metal: FreeRTOS, ThreadX, Zephyr, µC/OS - Cloud and IoT: AWS IoT, Firebase, ThingsBoard, WebSocket dashboards - GUI/HMI: Qt, LVGL, Flutter, PyQt, Kivy, TFT, e-paper, touchscreen interfaces - OTA and device management: ESP-IDF OTA, BLE DFU, cloud based updates - Bringup, debugging, testing, validation, and production support I build connected products that combine reliable hardware, clean firmware architecture, real time data processing, secure communication, and practical user interfaces. Whether you need a wearable health sensor, industrial IoT gateway, automation controller, medical prototype, or smart connected device, I can help define the system, reduce technical risk, and deliver a working product. For clients looking for a senior embedded systems engineer who can take ownership from concept to reality, I bring the technical depth, product mindset, and execution discipline needed to build reliable, modern embedded solutions. Let’s turn your idea into a reliable product. Thanks so much for taking the time to read my profile.