Chunhui X.

I transitioned to full-time freelance mechanical design at the end of July 2026 after 20 years of in-house senior structural engineering experience. While I am new to Upwork and building my review portfolio, I have mature end-to-end product development capability from mass-production hardware projects. I offer preferential introductory rates for early cooperation to deliver reliable design results and earn genuine reviews. **Core Skills** Precision Structural Design | DFM Manufacturability | GD&T Tolerance Control IP67 Waterproof Design | Ultrasonic Welding | Reliability Design Injection Molding | Sheet Metal | Die-casting | CNC Machining **Product Experience** Consumer Electronics | Wearable Devices | Water Bottle Hardware | Hand Tools & Shredding Equipment | Vehicle Antenna Structure **Antenna Team Capability** My dedicated small team undertakes full antenna projects: customized consumer electronics antennas & IoT antennas, covering structural design, performance debugging and full production follow-up. **CAD Tools** SolidWorks | Creo | Pro/E Over the past 3 years at my previous full-time role, I supported multiple startup clients & Kickstarter founders to complete consumer hardware R&D and mass production landing.