Jiang L.
Electrical Engineer | PCB Designer | ESP32 & IoT Developer
Shenzhen,
China
Global rank:
964
/
120,767
Skill pts: 37
1
Finalist
About
Hello! I am an experienced electrical engineer and PCB designer with over 10 years of expertise in developing innovative, reliable, and high-quality electronic solutions across diverse industries. Holding a bachelor’s degree in electrical engineering, I have a proven track record of designing, developing, and deploying advanced circuits, embedded systems, and IoT devices.
What I Bring to Your Project:
• PCB Design & Layout: Skilled in schematic capture and PCB layout using Altium Designer, Cadence, PADS Mentor Graphics, KiCad, EasyEDA, and RapidHarness. I have extensive experience designing multi-layer (up to 24 layers), high-density, HDI PCBs suitable for medium and high-volume production. I am familiar with manufacturing processes including JLCPCB for PCB fabrication and local support within China to facilitate manufacturing, prototype assembly, and quick revisions. I am committed to providing results on time and maintaining clear, prompt communication with clients.
• Microcontroller & Firmware Development: Proficient in programming STM32, ESP32, PIC, AVR, STM8, and STC microcontrollers using Keil, STM32CubeIDE, VSCODE, MPLAB X IDE, and more. I excel in developing firmware for IoT, automation, and embedded systems.
• IoT & Wireless Communication: Expertise integrating Bluetooth, BLE, LoRa, NB-IoT, RFID, WiFi (4G), MQTT, and other protocols into embedded systems.
• Sensor & Display Systems: Development of color screens, segment displays, touch panels, and interface solutions for user-friendly product experiences.
• Communication Protocols: Extensive experience with I2C, SPI, UART, CAN, RS232/485, Modelbus RTU, IR, RF (433/315 MHz, 2.4G, 4G, LoRa).
• Reverse Engineering & Troubleshooting: Capable of analyzing, debugging, and optimizing complex circuits.
• Power & Multimedia Systems: Power management circuits, LED lighting, audio devices, sensors, and multimedia integration.
• Support for China Local Manufacturing(PCBWAY, JLCPCB): In addition to design, I offer local support within China to facilitate manufacturing, prototype assembly, and quick revisions. This ensures smooth collaboration and shorter lead times
Why Work With Me:
I am passionate about delivering precise, innovative, and reliable designs tailored to your specific needs. I prioritize quality, efficiency, and clear communication to ensure your project’s success — from prototype to production. I am committed to providing results on time and responding promptly to any client inquiries, ensuring smooth and efficient collaboration.
... more »
« less
What I Bring to Your Project:
• PCB Design & Layout: Skilled in schematic capture and PCB layout using Altium Designer, Cadence, PADS Mentor Graphics, KiCad, EasyEDA, and RapidHarness. I have extensive experience designing multi-layer (up to 24 layers), high-density, HDI PCBs suitable for medium and high-volume production. I am familiar with manufacturing processes including JLCPCB for PCB fabrication and local support within China to facilitate manufacturing, prototype assembly, and quick revisions. I am committed to providing results on time and maintaining clear, prompt communication with clients.
• Microcontroller & Firmware Development: Proficient in programming STM32, ESP32, PIC, AVR, STM8, and STC microcontrollers using Keil, STM32CubeIDE, VSCODE, MPLAB X IDE, and more. I excel in developing firmware for IoT, automation, and embedded systems.
• IoT & Wireless Communication: Expertise integrating Bluetooth, BLE, LoRa, NB-IoT, RFID, WiFi (4G), MQTT, and other protocols into embedded systems.
• Sensor & Display Systems: Development of color screens, segment displays, touch panels, and interface solutions for user-friendly product experiences.
• Communication Protocols: Extensive experience with I2C, SPI, UART, CAN, RS232/485, Modelbus RTU, IR, RF (433/315 MHz, 2.4G, 4G, LoRa).
• Reverse Engineering & Troubleshooting: Capable of analyzing, debugging, and optimizing complex circuits.
• Power & Multimedia Systems: Power management circuits, LED lighting, audio devices, sensors, and multimedia integration.
• Support for China Local Manufacturing(PCBWAY, JLCPCB): In addition to design, I offer local support within China to facilitate manufacturing, prototype assembly, and quick revisions. This ensures smooth collaboration and shorter lead times
Why Work With Me:
I am passionate about delivering precise, innovative, and reliable designs tailored to your specific needs. I prioritize quality, efficiency, and clear communication to ensure your project’s success — from prototype to production. I am committed to providing results on time and responding promptly to any client inquiries, ensuring smooth and efficient collaboration.
Design Entries
Experience
-
Senior Hardware Engineer
Huaxing Electronics Co., Ltd · Full-time
Jul 2017 –
Feb 2024
6 yrs 7 mos
Shenzhen, Guangdong Province, China
• Led the hardware design and development for a range of IoT products, including smart home devices and industrial sensors, tailored for the Chinese market.
• Managed the complete PCB design lifecycle using Altium Designer, from schematic capture and component selection to layout, routing, and Gerber generation, ensuring compliance with Chinese regulatory requirements (CCC, SRRC).
• Developed embedded firmware for ARM-based microcontrollers, focusing on low-power communication protocols such as NB-IoT, LoRaWAN, and Bluetooth Low Energy.
• Collaborated closely with cross-functional teams (software, mechanical, product management) to define product specifications, develop prototypes, and bring products to mass production.
• Optimized designs for cost-effectiveness by leveraging strong relationships with local component suppliers and PCB manufacturers in the Pearl River Delta region.
• Mentored junior engineers in PCB design best practices, embedded firmware development, and DFM (Design for Manufacturing) principles. -
Electrical Engineer / PCB Designer
Jianwei Technology Group · Full-time
Aug 2012 –
Jan 2017
4 yrs 5 mos
Beijing, Beijing, China
• Designed and tested analog and digital circuits for a variety of embedded systems, including LED lighting controllers, touch panel interfaces, and power management circuits.
• Created multi-layer PCB layouts using Cadence OrCAD, adhering to industry standards and DFM guidelines.
• Developed and implemented test procedures for verifying circuit functionality and performance.
• Collaborated with mechanical engineers to ensure proper integration of electronic components into product enclosures.
• Sourced electronic components and PCB fabrication services from local suppliers.
• Contributed to the development of technical documentation, including schematics, BOMs, and test reports, in both English and Chinese.
Education
- Shanghai Jiao Tong University Bachelor of Engineering (BEng), Electrical engineering, Graduated 2007 – 2011
Stats
2 followers, 0 following
Age: 37
Joined: June 7, 2025
Last seen: December 16, 2025
Area of Expertise
Languages
English Professional working proficiency
Location
Shenzhen, China