Jordan S.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 Oct 22, 2026.

I build reliable embedded products from concept to working prototype, combining firmware, hardware, wireless communication, sensor integration, debugging, and production-focused design. My core expertise includes ESP32, ESP32-S3, ESP32-C3, STM32, Arduino, FreeRTOS, BLE, Wi-Fi, LoRa, CAN, RS485, MQTT, embedded Linux, Raspberry Pi, custom PCB development, and real-time sensor systems. I can support both focused technical tasks and complete product development—from architecture and component selection to firmware, testing, documentation, and prototype validation. Core Capabilities • Embedded Firmware Development ESP-IDF, Arduino Framework, STM32 HAL/LL, FreeRTOS, embedded C/C++, interrupts, timers, state machines, task scheduling, watchdogs, bootloaders, OTA updates, memory optimization, low-power modes, and fault recovery. • BLE, Wi-Fi & Mobile Connectivity Bluetooth Low Energy services, notifications, provisioning, device pairing, JSON data exchange, Wi-Fi onboarding, reconnection logic, HTTP/HTTPS, MQTT, REST APIs, cloud communication, and testing with tools such as nRF Connect. • Sensors, Motion & Wearable Systems IMUs, accelerometers, gyroscopes, Hall-effect sensors, load cells, ADCs, EMG and biosignal interfaces, vibration motors, sensor fusion, calibration, filtering, motion metrics, event detection, and real-time feedback systems. • LoRa & Wireless Monitoring LoRa, LoRaWAN, RadioLib, SX1262, distributed sensor nodes, packet design, retry logic, gateway communication, telemetry, remote monitoring, and offline-capable data collection. • Automotive & Industrial Communication CAN, ISO-TP, OBD-II, Mode 09, CAL ID, CVN, UART, SPI, I2C, RS485, Modbus, diagnostics, communication timing, multi-frame responses, industrial sensors, and field troubleshooting. • Raspberry Pi, Linux & Edge Devices Raspberry Pi, Python, Linux services, GPIO, cameras, microphones, physical buttons, kiosk applications, local storage, cloud synchronization, FFmpeg, automatic startup, and recovery after power or network interruptions. • Edge AI & Camera Systems Camera integration, real-time edge inference, offline inspection, AI model deployment, device management, inspection-result storage, cloud synchronization, and performance optimization. • Hardware & PCB Development System architecture, schematic design, PCB layout, component selection, BOM preparation, board bring-up, USB, Ethernet, CAN, RS485, battery charging, power protection, RF layout, EMI/EMC considerations, and manufacturing documentation. What I Deliver • Clean, commented, maintainable source code • Working prototypes and hardware integration • Schematics, PCB files, wiring diagrams, and BOMs • Communication protocols and technical documentation • Debugging, testing, calibration, and validation reports • Remote setup, screen-sharing support, and knowledge transfer Why Clients Hire Me I approach embedded projects as complete systems. Firmware, hardware, connectivity, sensors, power, cloud communication, and user setup must work together reliably. I focus on practical results: stable operation, measurable performance, simple installation, graceful failure recovery, reusable architecture, and documentation that supports future development. Whether you need an ESP32 wearable, BLE sensor, LoRa monitoring system, automotive diagnostic solution, Raspberry Pi device, edge AI camera platform, industrial gateway, or commercial IoT prototype, I can help you develop a dependable solution ready for real-world testing.