Hire the Best Electronic Engineers
in China

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

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

Who AM I ? I am Caleb. Below is my brief Elevator pitch. WATCH OUT! Hi My precious Customers, I am New to upwork, you may worry that without customer reference and work history in upwork of this guy, your project may get sucks if hiring this guy. But believe me, I have been in product design and sourcing for 10 years and in my previous full-time job, my boss has a good impression of me and highly recommend me to his connects and friends cause he thinks I am trustworthy guy. So don't worry, You can provide your projects and have a try, If there is any dissatisfaction during the service, I can guarrantee I will pay back the money you have paid. 👍 About Me: Successfuly designed and manufactured 15 products to clients, including Fortune 500 & Start-ups. 💪MY ABILITIES Product Design(3D CAD, 2D Engineering Drawing, Mechanical Design, DFMA,) Factory sourcing in Pearl River Delta in Guangdong Province 👍Rapid Prototyping CNC Sheet Metal(Laser Cutting, Bending, Welding, Stamping, Punching) 3D Printing Prototype/Soft Molding 👍Production(NPI & MP) CNC(Machining, Turning) Sheet Metal(Laser Cutting, Bending, Welding, Stamping, Punching) Plastic Injection Molding, Plastic Blow Molding, Silicone Molding Die Casting, Alumium Extrusion, Stainless Steel Etching Surface Treatment(Anodizing, Powder Coating, Electroplating, Painting, Silkscreen Printing, Laser Engraving) 👍Quality Control Factory facility/quality audit Sample Review 👍Others Factory sourcing International Shipping Technical Translation/Translator 💬Let's chat and discuss about your project!

I’m a professional PCB design engineer with extensive experience in developing high-speed digital, RF, and embedded system hardware. Over the years, I’ve successfully designed and delivered dozens of production-ready PCBs across various industries — from industrial automation and telecommunications to IoT, radar, and medical electronics. My work covers the entire product development cycle, including schematic design, PCB layout, signal & power integrity (SI/PI) analysis, EMI/EMC optimization, and DFM validation for mass production. I focus on precision, performance, and reliability, ensuring that every design meets the client’s technical and manufacturing requirements. My Expertise PCB Design: Multilayer, high-speed, RF/microwave, and mixed-signal boards High-Speed Interfaces: DDR, USB, HDMI, Ethernet, LVDS, PCIe EDA Tools: Altium Designer/Kicad/easyEDA/Eagle / OrCAD / Cadence Allegro /PADS Simulation Tools: Proteus/Multisim/CST / HFSS / ADS / LTspice / HyperLynx Hardware Design: Analog and digital circuits, power management, embedded boards Manufacturing Optimization: DFM, DFT, impedance control, EMC compliance Collaboration: Strong coordination with firmware, mechanical, and production teams What I Can Deliver ✅ Complete circuit & PCB design (Prototype to Mass Production) ✅ Enclosure design for PCB and 3D printing ✅ High-speed & RF PCB layout with impedance matching and SI/PI analysis ✅ EMI/EMC issue troubleshooting and optimization ✅ Design improvement and cost reduction consulting ✅ Antenna and RF front-end layout design ✅ Documentation for manufacturing and assembly

A decade of expertise in transforming complex automation concepts into high-performance, mass-produced machinery. With 10 years of experience in the Automation and Precision Laser industries, I specialize in designing full-scale production lines that balance extreme precision with industrial reliability. Key Achievement: I led the mechanical design of a Laser Coating Removal system that achieved $15 Million (110M RMB) in sales, proving my ability to design equipment that survives the most rigorous market demands. What I bring to your project: Design for Manufacturing (DFM): I don't just draw; I ensure every part is optimized for CNC, sheet metal, or injection molding to minimize your fabrication costs. Complex System Integration: Expert in SolidWorks top-down design for assemblies with 800+ components, integrating SMC/Festo pneumatics and Keyence/Omron sensors. Process Mastery: Deep knowledge of Lithium battery assembly and precision laser cutting/drilling. Proven Reliability: 10 technical patents and a history of leading projects from initial 3D layout to on-site commissioning. Let’s build something robust, efficient, and ready for production.

Mechanical Design Engineer with 10+ years of experience in product mechanical design for consumer electronics, automotive switch modules, connectors, and precision mechanical components like plastic enclosures, sheet metal parts, and die-casting parts. Previously, I worked at global companies such as Amphenol and Littelfuse, where I was responsible for mechanical design, 3D modeling, assembly design, manufacturing drawings, and supporting products from development to mass production. I specialize in 3D product design, CAD drafting, DFM, and rapid prototyping. My experience covers the complete product development process, from concept design and engineering drawings to prototype validation and manufacturing support. My expertise includes: • 3D modeling and assembly design using Creo • 2D CAD manufacturing drawings and technical documentation • Product structure design for consumer electronics products/electronic components/precision mechanical parts • DFM for plastic injection parts, sheet metal structures, 3D printing • 3D printing design, prototype optimization, and design validation • Converting sketches, PDFs, or ideas into accurate CAD models • Supporting prototype builds and design optimization I can help with: • CAD drafting and technical drawings • 3D modeling for mechanical parts • Product structure design • Design optimization for manufacturing • STEP / DWG / STL file preparation • 3D printing design and prototype preparation I focus on accurate design, clear communication, and fast delivery. Feel free to contact me to discuss your project.