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Professional Summary 1.Senior Hardware Engineer with 15+ years full-cycle product development experience, specializing in medical rehabilitation equipment, industrial HMI, high-speed embedded core boards, IoT collectors, surveillance hardware, and custom automated test fixtures.Independently deliver end-to-end hardware work: 2.requirement analysis, component selection, schematic & 2–8 layer PCB layout, high-speed signal impedance matching, EMC/safety rectification; 3. STM32/GD32 MCU firmware development, BOM/Gerber/SMT production files, PCB factory coordination, prototype verification and mass production after-sales troubleshooting. Core Technical Skills 1.Hardware Design: Schematic capture, multi-layer PCB layout, high-speed signal integrity, timing & impedance matching 2.MCU & Communication: STM32/GD32, RK3399, Hisilicon HI35xx; CAN, RS485 Modbus, 4G/Wi-Fi, TCP, 4–20mA analog acquisition 3.Product Compliance: EMC radiation/conducted test, medical safety rectification, CE certification support 4.Custom Fixture: Automatic production test tool hardware + firmware design, labor & cycle time optimization 5.Mass Production: BOM, Gerber, SMT coordinate output, PCB sampling follow-up, production defect resolution 6.Industries: Medical rehabilitation, industrial touch screen, IPC/NVR surveillance, IoT, elevator control, UV curing, smart wireless devices

👋 Hello, I am YanXia Xu. Embedded Systems Engineer with nearly 30 years of experience in industrial automation and embedded firmware development. Specialized in MCU firmware, RTOS-based systems, industrial communication protocols, and embedded Linux platforms. Extensive experience supporting Japanese enterprise projects and long-term industrial product maintenance. Strong background in debugging, hardware-software integration, and reliable embedded system design.

Embedded Systems & IoT Product Development Engineer | STM32 • ESP32 • Nordic • Silicon Labs • PCB Design I help startups and companies transform ideas into production-ready embedded products. With 8+ years of experience in embedded systems, firmware development, PCB design, wireless connectivity, and product commercialization, I provide complete end-to-end engineering support—from concept and architecture to prototypes, testing, and manufacturing. My expertise spans industrial automation, IoT devices, wireless sensor networks, battery-powered systems, smart metering, wearable electronics, RF products, and custom embedded hardware. What I Deliver: • Embedded firmware development (Bare Metal, FreeRTOS, Zephyr) • Custom PCB design (Altium Designer, KiCad) • Hardware architecture and schematic design • Prototype bring-up, debugging, and validation • Low-power and battery-operated device optimization • Manufacturing-ready design packages (Gerbers, BOM, Assembly Files) • Design for Manufacturing (DFM) and Design for Test (DFT) • Technical documentation and production support Core Technologies: • STM32 (F0/F1/F4/F7/H7/U5/L0/L4/L5) • ESP32 (ESP-IDF, Arduino) • Nordic nRF52 Series • Silicon Labs EFR32 Series • RP2040 / Raspberry Pi • NXP and Microchip MCUs Wireless & Connectivity: • BLE / Bluetooth Low Energy • Wi-Fi • LoRa / LoRaWAN • Wi-SUN FAN • Zigbee • Thread / Matter • Cellular (LTE-M, NB-IoT, GSM) • RS-485 / Modbus • CAN / CAN-FD • Ethernet / TCP-IP • USB Applications & Sensors: • Environmental Monitoring • Industrial Automation • Smart Metering • Wearable Electronics • GPS Tracking • Energy Monitoring • Medical & Bio-Sensing Devices • Motor Control • Data Acquisition Systems Development Tools: • STM32CubeIDE • VS Code • Keil MDK • IAR Embedded Workbench • MPLAB X • Altium Designer • KiCad • LTspice • Git Whether you need a new product designed from scratch, firmware development for existing hardware, PCB design, debugging, or manufacturing support, I can help bring your project from concept to a reliable, market-ready product. Let's discuss your project and turn your idea into a working product.

1. more than 8 years experience in data analytics field 2. worked 10 years in international projects, fluent communication in English & German 3. good knowledge in the following technologies, including Tableau, PowerBI, Python, R, SQL, Excel

▶️I am a hardware engineer specializing in power electronics and battery-powered IoT systems. I help clients turn hardware concepts into working systems, including DC-DC design, battery charging circuits, and PCB bring-up and debugging. ▶️My core expertise includes power electronics and embedded hardware design for low-power and battery-operated systems. I work extensively with DC-DC converters (buck, boost, and buck-boost), battery charging circuits, and power management design for IoT and portable devices. I also handle PCB review, hardware bring-up, and debugging of power-related issues such as instability, noise, and efficiency optimization. ▶️I focus on hands-on engineering work in battery-powered IoT devices, power electronics, and embedded hardware systems. My typical projects involve system-level design, PCB bring-up, debugging, and optimization of existing hardware. I can also support early-stage projects by helping refine hardware requirements when there is a clear intent to develop a working product. ▶️Based in Shenzhen, the global hardware hub, I can provide direct oversight for sourcing and PCBA manufacturing

I am an Electrical/Electronic Engineer having master's degree in electrical/Electronic Engineering with 14 years of experience in the field of Power electronics, Embedded systems, analog and digital electronics, Wireless sensor network and Internet of Things. I have developed hardware and Embedded systems of IOT devices, Environment Monitoring devices, Power electronic converters (DC -DC, AC to DC and DC to AC), Inverters, VFD (variable frequency Drive) simulation and Testing. I have skills and experience in following areas ✔Circuit Designing (analog and Digital), from concept to prototype and prototype to production ✔Firmware development based on STM32, Arduino, Raspberry Pi, ESP32 and ESP8266 ✔Wireless communication based on Lora Modules, Zigbee modules, NRF Module, NRF51822 BLE module ✔ IoT / Embedded Electronics Engineering Projects ✔Mathematical Modeling, Components Selection, Schematic Designing and PCB designing based on Altium Designer. ✔sourcing of components, negotiation of components and manufacturing of customized product ✔Testing and Debugging of Electronic circuits. ✔Hardware Designing of data loggers with sensors intergeneration. ✔Assembly services of electronic circuits and products ✔Robotics and automation ✔Power electronic converter circuit (buck converter, boost converter, inverters) designing testing and debugging ✔ ESP32 based projects like water quality tester, AI based gesture recognition system ✔ESP32 CAM based face recognition system ✔ESP32 based AI camera ✔ Arduino based embedded system projects using sensors and actuators' ✔Deep knowledge and expertise DC and AC motor driver designing ✔ EMI and EMC testing ✔Experienced Schematic and PCB designing trainer ✔ Experience embedded systems and IOT trainer