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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

# Embedded Hardware Development & Electronics Manufacturing Partner | SME & Hardware Companies Helping hardware companies turn engineering concepts into manufacturable electronic products. I work with **electronics companies, hardware startups, OEM brands, and engineering teams** needing practical support across embedded hardware development, PCB design, prototyping, and low-volume manufacturing. With 20+ years in electronics engineering, manufacturing, and international supply chain collaboration, I bridge **product engineering and manufacturing execution** — helping clients reduce development risk, accelerate iteration, and improve production readiness. ## Why Clients Work With Me ✔ 20+ years in electronics engineering, manufacturing & supply chain management ✔ 13 years with Fortune 500 companies including Flextronics and Huawei ✔ Founder of engineering & manufacturing organizations supporting hardware product development ✔ Direct access to cross-functional engineering and manufacturing resources in Shenzhen ✔ Experience supporting embedded electronics, IoT, industrial devices, telecom, smart products, and automation equipment --- ## Core Services ### Embedded Hardware Development • Hardware architecture & system design • Circuit design (analog / digital) • PCB design & layout • Embedded systems integration • MCU / wireless platform selection • Sensor & connectivity integration • DFM / DFT engineering review --- ### Electronics Product Development • Prototype development • Technology selection & feasibility analysis • Product engineering support • Engineering validation assistance • Manufacturing readiness planning --- ### Electronics Manufacturing Support • PCB fabrication & PCB assembly • Prototype build & pilot production • Component sourcing & supply chain coordination • Box build / product assembly support • Low-volume electronics manufacturing • Contract manufacturing coordination --- ## Typical Clients I am typically a good fit for: ✔ SME electronics companies ✔ Industrial IoT developers ✔ Embedded device companies ✔ Hardware product teams ✔ OEM / ODM brands ✔ Engineering managers needing external hardware development support --- ## Technologies & Domains ### Embedded / Hardware Platforms ESP32, STM32, ARM, Raspberry Pi, Jetson, embedded Linux platforms ### Connectivity BLE, WiFi, Ethernet, MQTT, NFC, RFID, Zigbee, LTE, NB-IoT, UART, SPI, I2C ### Product Categories Industrial IoT Smart Devices Monitoring & Measurement Embedded Electronics Consumer Electronics Automation Equipment Telecom & Connectivity Systems --- ## Working Style I deliver the best results when projects have: ✔ Clear technical objectives ✔ Defined scope or engineering requirements ✔ Collaborative communication ✔ Practical development and commercialization goals --- ## Selected Feedback "Frankie is an excellent engineer and supervisor… expecting my next opportunity to work with Frankie." — Huawei Hardware R&D Manager "Xiaolin’s team is very professional and hardworking… always satisfied with the jobs they delivered." — CEO, electronics product company "Outstanding support in hardware engineering and execution." — Engineering Director, global networking company Tags: Electrical Engineering, Electronics Engineer, 3Dmodeling,ID,Firmware, PCB layout, Schematics, Altium Designer, IoT, Power Electronics, Bluetooth, BLE, RF, TI,FPGA, SoC, VHDL, Verilog, Xilinx, Altera, C, C++, MCU, RTOS, prototype, validation, Enclosures, BMS, SolidWorks, Android, iOS, Java, Apps, Database, AWS, Python, ESP32, Arduino, PIC, NXP, STM32, LCD, Raspberry Pi, Wi-Fi, Prototyping, WAN, Assembly, Motor Driver, JLC,Electronic, Consumer, Automotive, Industrial, Medical, Custom Product Design, Supply Chain Management, Sourcing Agency,Procurement, Logistics, International Trade, Quality Control, Product Development, Manufacturing, Prototype, Testing, Product Launch, Project Management, Client Satisfaction, English, Chinese, China, Communication, Coordination, Innovation, Creativity, Technical Skills, Analytical Skills, Problem-Solving, Leadership, Time Management, Cost Reduction.

🏆 Top Rated Plus • Top 3% on Upwork • 13,000+ hours delivered 🏆 226+ projects with 5-star reviews • 1,000+ SKUs successfully moved to mass production 🏆 25+ years engineering pedigree - Airbus, Thales Group, Safran & secure mobile networks Why Clients Hire Me I’m a true engineering partner with a full team and own a facility in South China: ✅ In-house SMT prototyping line - boards assembled in hours, not weeks ✅ Own plastic injection molding workshop - CNC, EDM, small-to-mid presses (mold + tooling + production under one roof) ✅ R&D lab for signal, power, safety & environmental validation ✅ Reliability testing lab - ESD, vibration, temperature/humidity, salt spray, waterproof ✅ Local sourcing teams in Shenzhen (China), Chennai (India) and Ho Chi Minh City (Vietnam) - a ready-made China +1 option Every stage of your project is under our direct control - never outsourced to unknown factories. What I Deliver 1. R&D & Full-Cycle Product Development - End-to-end hardware development from concept to mass production - including industrial design, IP-rated enclosures, and DFM-ready CAD. - I help startups and established brands through professional engineering, prototyping, tooling, certification, and production. 2. Electronics & PCBA Design - Schematics, multilayer PCB layout, component selection, and manufacturing-optimized Gerber files. - Embedded systems on STM32, ESP32, nRF, and Raspberry Pi, with BLE/Bluetooth, RF, IoT, custom sensors, motion control, robotics, and automated machines. - Firmware in C, C++, and embedded software with user interfaces. 3. Plastic Injection Molding (In-House Workshop) - Complete in-house service in China: DFM, mold design, tooling fabrication, and production. - Faster lead times, tighter quality control, stronger IP protection, and quick validation with first shots and pre-production runs. What My Clients Get ✅ Rapid prototypes (typically 14-21 days) ✅ Complete support from initial concept through CAD/DFM, tooling, certification, packaging, and logistics ✅ Direct factory access across China, India & Vietnam - a built-in China +1 option, no middlemen Track Record ⭐ 50 Engineering Design Projects Completed from Scratch ⭐ 54 Projects Successfully Transitioned into Production ⭐ 750+ Clients Assisted with Product & Component Sourcing ⭐ 22,000+ Orders Processed ⭐ 30,000+ On-Site Audits and Inspections Conducted Tools & Tech Stack CAD: Siemens NX (UG), Creo/ProE, SolidWorks, AutoCAD, ANSYS EDA: Altium Designer, KiCad, EasyEDA, Eagle, Pads Platforms: STM32/8, ESP32, nRF52/54, Raspberry Pi, Arduino, STC8, Airoha156x/157x, JieLi709x Programming: C, C++, Python Languages: English (Fluent) | French (Native) | Chinese (Conversational) If your product needs expert engineering, reliable sourcing, and tooling all handled by one experienced team, message me and I’ll be glad to talk through your project.

● From Concept to Market: Integrated Engineering via the GBA Supply Chain. I am a full-stack engineer and founder of DigiMech Studio, an independent one-man R&D consultancy based in the Greater Bay Area. With over two decades of experience leading hardware projects from PoC to mass production, I offer a unified solution for Mechanical, Electrical, and Firmware development. My studio acts as your local technical partner in China, providing the precision of an experienced R&D Lead while maintaining the agility and cost-effectiveness of a solo expert. ● Why Work With Me? 🛠️ One-Stop Decision Maker (EE/ME/FW): 20+ years of expertise rooted in my degree in Mechanical Manufacturing and Equipment Automation. I solve problems that involve hardware, casing, and code simultaneously. I make instant technical decisions on the factory floor to keep your project moving without delays. 🚀 Supply Chain & Chip Strategy (Ex-Distributor): With a background in top IC distributors(ZLGMCU), I don't just buy parts; I optimize your BOM. I specialize in chip substitution (NXP/TI/ST) to solve shortages and cut costs. I also have mature channels for sourcing X86/ARM motherboards and industrial peripherals. 🏭 Tooling & Manufacturing Oversight: I bridge the gap between design and mass production. I personally oversee injection mold opening and modifications, ensuring your mechanical parts are DFM-compliant and avoiding costly re-tooling cycles. 📡 Industrial IoT & Control Expert: Deep technical expertise in high-reliability industrial communication protocols, including CAN, RS485, Zigbee, NB-IoT, and LoRa. I design robust systems for smart grids and industrial automation. ⚡ From Prototype to Mass Production: Leveraging my local network, I deliver functional PCBA prototypes in 4 days and CNC/3D parts in 3 days. Beyond speed, I specialize in scaling to mass production (MP), providing on-site DFM support, factory auditing, and production line optimization to ensure high yield and quality. ● My "Full-Stack" Core Competencies: ⚡ Hardware Engineering (EE): Expert in Schematic & High-Speed PCB Layout (Altium Designer / Cadence OrCAD), Analog/Digital Circuit Design, and BOM Cost Optimization. ⚙️ Mechanical Design (ME): Proficient in ProE/Creo for Plastic Injection Molding & Sheet Metal Enclosures. Strong focus on DFM (Design for Manufacturing) to ensure smooth tooling processes. 💻 Embedded Firmware (FW): Deep expertise in C/C++ (Keil MDK/IAR) for ARM Cortex-M (STM32/NXP). Experienced in Industrial Protocols (CAN/RS485/Modbus). 🛠️ Production Automation & Tools: Development of custom PC-based GUI Testing Tools using VC++ / Python. I build automated solutions for Factory Acceptance Testing (FAT) to ensure mass production quality. 🚀 Product Performance & Reliability Optimization -RF Optimization: Antenna Matching(wifi/Lora/BT), Link Budget Analysis, Range Extension. -Signal Integrity: EMI/EMC Filtering, Differential Pair Routing, Noise Suppression. -Reliability Engineering: Component Derating, Thermal Management. ● My Workspace: I run a private R&D studio where I spend 12+ hours a day. It is not just an office; it is a workshop designed for rapid prototyping and deep technical analysis. This allows me to handle physical samples and manage logistics directly from my desk. ● My Commitment: I am a "Tech Geek" obsessed with solving hard problems, Note: I specialize in technical reading and writing. To avoid any potential language barriers in verbal communication and to ensure 100% accuracy in engineering specs, I communicate exclusively through text. This ensures every detail is correctly understood and executed. ⚡⚡ From Concept to Market: Whether you need New Product Development (NPI) from scratch, a quick prototype, a cost-down analysis, or a factory liaison, I bring the "China Speed" to your project. I bridge the gap between your idea and a shelf-ready product, ensuring every stage is optimized for performance and profit.

Title: Embedded Systems Engineer | PCB Design (EasyEDA/Altium) | PCBA Hi, I’m Junyang (Ryan) Chen, an embedded systems developer based in the heart of the global electronics hub—Shenzhen, China. I specialize in taking hardware concepts from schematic design to fully functional prototypes, leveraging local supply chains to ensure speed and quality. What I Do Best: Fast PCB Design & Layout: Expert in using EasyEDA (LCEDA) for rapid prototyping and Altium Designer for complex multilayer boards. I can seamlessly connect design with manufacturing (JLCPCB/PCBWay) to get your boards printed in as little as 24 hours. Embedded Firmware Development: Proficient in C/C++ with extensive experience in 51-series and STM32 (32-bit) microcontrollers. I apply algorithmic thinking from competitive programming to build efficient, stable firmware. Rapid Prototyping & Manufacturing: Based in Shenzhen, I provide a unique advantage in sourcing components and managing PCB/PCBA production. I ensure every design is Optimized for Manufacturing (DFM). IoT & Sensor Integration: Successfully developed projects involving OLED displays, RTC, environmental sensors, and PID control. Why Work With Me? I am a Computer Science student backed by a family-owned electronics manufacturing facility. This gives me insider knowledge of the production process—meaning I don't just draw circuits; I build products that work in the real world. Let’s bring your hardware vision to life.

I'm an electronics engineer experienced in Schematic and PCB design or Layout. EDA Tool-Altium Designer(Protel99SE) Circuit design,Schematic,PCB Layout,,include Footprint. I owned a SMD/SMT assembly factory, So I can supply a prototype fully tested per your requirements and also run a production for small and medium batches.