Engr.zunuran

PCB Design Engineer

Upwork • Freelance

Aug 2020 - Present • 5 yrs 9 mos

I am a Top Rated Plus Electronics Engineer on Upwork with 200+ completed projects, specializing in PCB design and embedded hardware development. My work focuses on designing production-ready electronics for startups and engineering teams worldwide. I have developed a wide range of hardware including ESP32-based systems, STM32 microcontroller boards, IoT devices, industrial communication interfaces, and power electronics. Many of my projects involve industrial IoT systems, cellular communication (LTE-M / NB-IoT), sensor nodes, and embedded control systems. My PCB design experience includes 2–6 layer boards, high-current layouts, signal integrity considerations, and robust power distribution. I regularly design PCBs using KiCad, EasyEDA, and Altium Designer, delivering complete manufacturing packages including Gerber files, BOM with manufacturer part numbers, and pick-and-place files for assembly services such as JLCPCB and PCBWay. I have also worked on hardware involving RS485 / Modbus communication networks, GNSS modules, battery-powered electronics, solar-powered IoT devices, and embedded controllers based on ESP32 and ARM Cortex-M microcontrollers. My focus is always on reliable, manufacturable designs that move smoothly from prototype to production. I collaborate closely with clients to review schematics, optimize layouts, verify components, and prepare designs for manufacturing. Through Upwork I have worked with clients across North America, Europe, and Asia, delivering hardware solutions for industrial, IoT, and embedded electronics products.