Jiachuan L.
Hardware Product Development Expert | From Concept to Mass Production in China
Tokyo,
Japan
Global rank:
16,964
/
140,762
Skill pts: 5
About
I make hardware happen in China.
You have a product idea. You need someone who can actually build it – not just draw it, but mold it, assemble it, and ship it. That's what I do.
Here's what makes me different:
🏭 FACTORY ACCESS
My family runs an injection molding factory + tooling shop in Zhejiang, China. When you work with me, you're not hiring a freelancer – you're getting direct access to a production line.
📦 SMALL BATCHES WELCOME
Need 500 units? Most factories won't even reply. I will. I handle prototyping ➔ mold making ➔ production ➔ shipping, all in one seamless workflow.
🔧 13 YEARS, 4 INDUSTRIES
Over 13 years of heavy engineering experience across personal care (hair dryers, beauty devices), outdoor power equipment (lawn mowers), and children's ride-ons. If it has plastic parts and electronics, I've built it.
WHAT I CAN DO FOR YOU:
✅ Full product development: sketch ➔ 3D design ➔ prototype ➔ tooling ➔ production ➔ delivery
✅ DFM analysis + mold design + competitive supplier quotes
✅ Small batch pilot production (500–5,000 units) with water resistance & fatigue testing
✅ Competitor teardown + cost analysis reports
✅ Factory audits and quality control in China
✅ Payment in USDT accepted
HOW IT WORKS:
1. You share your idea (sketch, reference, STL – anything works).
2. I design for manufacturing + quote you the full cost.
3. You approve ➔ I make the mold ➔ run the production.
4. You receive finished products at your door.
Let's talk about your project. Click the button and tell me what you're building. I'll respond within 24 hours.
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You have a product idea. You need someone who can actually build it – not just draw it, but mold it, assemble it, and ship it. That's what I do.
Here's what makes me different:
🏭 FACTORY ACCESS
My family runs an injection molding factory + tooling shop in Zhejiang, China. When you work with me, you're not hiring a freelancer – you're getting direct access to a production line.
📦 SMALL BATCHES WELCOME
Need 500 units? Most factories won't even reply. I will. I handle prototyping ➔ mold making ➔ production ➔ shipping, all in one seamless workflow.
🔧 13 YEARS, 4 INDUSTRIES
Over 13 years of heavy engineering experience across personal care (hair dryers, beauty devices), outdoor power equipment (lawn mowers), and children's ride-ons. If it has plastic parts and electronics, I've built it.
WHAT I CAN DO FOR YOU:
✅ Full product development: sketch ➔ 3D design ➔ prototype ➔ tooling ➔ production ➔ delivery
✅ DFM analysis + mold design + competitive supplier quotes
✅ Small batch pilot production (500–5,000 units) with water resistance & fatigue testing
✅ Competitor teardown + cost analysis reports
✅ Factory audits and quality control in China
✅ Payment in USDT accepted
HOW IT WORKS:
1. You share your idea (sketch, reference, STL – anything works).
2. I design for manufacturing + quote you the full cost.
3. You approve ➔ I make the mold ➔ run the production.
4. You receive finished products at your door.
Let's talk about your project. Click the button and tell me what you're building. I'll respond within 24 hours.
Experience
-
Founder & Principal Mechanical Design Lead
Oscar Hardware Sourcing & Engineering Studio · Self-employed
Jun 2024 –
Present
2 yrs 1 mos
Zhejiang, China
Provide turnkey engineering consulting and mechanical optimization services for international hardware startups, premium consumer brands, and cross-border e-commerce sellers.
Our studio's multi-sector expertise spans high-precision consumer hardware, heavy-duty industrial equipment, and safety-critical juvenile products:
- Premium Consumer Electronics & Personal Care: Extensive track record in engineering advanced High-Speed Hair Dryers, Beauty Devices, and Electric Toothbrushes. Expert mastery over compact internal component stacking, thermal management, high-rpm impeller balance, and rigorous waterproof engineering (IPX7 sealing).
- Outdoor Power Equipment & Gardening Tools: Heavy experience managing high-volume OEM/ODM engineering pipelines for world-leading gardening tool giants (such as Makita and Husqvarna), specializing in robust multi-component plastic structures and durability analysis.
- Juvenile Products & Children's Vehicles: Proven capability in structural engineering and complex mechanical folding/locking mechanisms for top-tier stroller and children's vehicle exporters, ensuring 100% compliance with rigorous global safety standards (US ASTM and European EN certifications).
Utilize Creo (Pro/E) to perform exhaustive Design for Manufacturing (DFM) reviews, optimizing wall thickness and tool drafts to completely eliminate injection molding defects and warpage before cutting mold steel. Leverage localized supply chain networks in the Ningbo/Cixi/Yuyao clusters to audit specialized tooling shops, manage RFQs, handle factory tooling audits, and secure cost-effective manufacturing with on-site quality control for foreign clients. -
Senior Mechanical Design Engineer
Premium Consumer Electronics ODM Manufacturer (Philips & Xiaomi Partner) · Full-time
May 2021 –
May 2024
3 yrs
Zhejiang, China
- Managed end-to-end product development for personal care devices including high-speed hair dryers, handheld beauty instruments, and electric toothbrushes for international brands.
- Specialized in compact internal component stacking, thermal management, high-RPM impeller balancing, and rigorous waterproof engineering (IPX7).
- Conducted DFM reviews and optimized designs for high-volume injection molding and assembly.
- Coordinated with suppliers and factories to ensure quality, cost targets, and timely production release.
- Supported products that achieved significant market share in the global personal care appliance segment. -
Mechanical Design Engineer
Top-tier Children’s Vehicle Manufacturer (Domestic Top 10) · Full-time
Mar 2018 –
Mar 2021
3 yrs
Zhejiang, China
- Led structural design and continuous improvement for children’s tricycles, ride-on cars, and snow vehicles from concept to production.
- Designed complex folding and locking mechanisms while ensuring full compliance with rigorous US ASTM and European EN safety standards.
- Performed detailed DFM (Design for Manufacturing) analysis on plastic parts, metal tubes, and assemblies to optimize moldability and reduce production defects.
- Coordinated with tooling suppliers and oversaw prototype development, testing, and production ramp-up.
- Collaborated with cross-functional teams to improve product durability, safety, and cost efficiency for export markets. -
Project R&D Engineer
Leading Chinese Gardening Tools Manufacturer (Top 3) · Full-time
Feb 2012 –
Feb 2018
6 yrs
Zhejiang, China
Led full-cycle development of electric and gasoline-powered garden tools (string trimmers, blowers, lawn mowers) from concept to mass production for domestic and international markets.
Specialized in plastic part design, sheet metal structures, and multi-component assembly optimization using Creo.
Conducted DFM reviews, prototype validation, tooling coordination, and production release, significantly reducing development cycles and manufacturing costs.
Ensured compliance with EU and US safety & certification standards (CE, UL, etc.).
Managed cross-functional projects with suppliers and internal teams to deliver over 20 new product models.
Stats
0 followers, 0 following
Joined: June 15, 2026
Last seen: July 17, 2026
Area of Expertise
Industrial Design Services
Mechanical Engineering
Structural Engineering
New Invention Development
Electronic Devices
3D Printing Services
Injection Molding and Casting
Tool Design Services
Reverse Engineering
Sheet Metal Design
3D Solid Modeling
3D Models of Machine Parts
2D CAD Drafting Services
Assembly Modeling Services
Creo Design Services
2D to 3D Modeling
Mechanical Drawing Services
Design for Manufacturing and Assembly
DFM Services
Design for Manufacturability (DFM Services)
Languages
English Professional working proficiency
Chinese Native or bilingual proficiency
Location
Tokyo, Japan