Mold Design & Development Engineer / 金型設計・開発エンジニア

Your Job Mold Design and Development Engineer / 金型設計・開発エンジニア

Our Team You will play an active role as a precision injection mold design engineer in the mold development organization. While design work using NX CAD is central, you will be involved end-to-end—from early product development stages through mass production—within each project.

You will work as a Mold Engineer at either the Kagoshima Plant or the Yokohama (Minato Mirai) office. In addition to collaborating with engineers at the Shizuoka Plant, you will have opportunities for technical exchange with engineers at overseas sites, including Korea and Shanghai. International travel is expected, and there is potential for an overseas assignment in the future.

This is a workplace where early-career, mid-level, and experienced employees thrive. By taking ownership of designs aligned to each individual’s skills and strengths, you can find both fulfillment and growth in your work. The environment encourages open exchange of advice and opinions regardless of tenure or age, and close communication among employees is a key strength. Communication with colleagues and managers is strong, enabling transparent and smooth operations.

We are looking for someone who can plan proactively and work with a strong sense of ownership, identify challenges and think through solutions, and persistently strive toward goals.

What You Will Do

• Mold design and development for BtoB/FPC/WtoB connectors using 3D CAD (NX) in particular, including MT-Ferrules, multi-pin designs, and microstructures.
• Design and development of molds for advanced connectors, including related assembly and ramp-up/start-up activities.
• Meetings and coordination with Product Design, Manufacturing, and Quality Evaluation teams during new product development.
• Process development to reduce mold cost and shorten lead time.

Who You Are (Basic Qualifications) ・ 5+ years of experience in injection mold design and startup, with end-to-end involvement from design through trial runs to mass production launch.

・ Experience in mold design for precision parts (products and molds with critical dimensions at the 5-micron level), including dimensional and tolerance design that accounts for the thermal effects of materials.

・ Experience designing molds incorporating numerous pins and microstructures (e.g., fine-diameter pins, deep holes, complex slide mechanisms).

・ Practical experience with precision molds for connectors, optical components, and electronic parts, particularly ferrules, connectors, and optical components.

・ Experience in molding and mold design for crystalline and high-rigidity resins such as PPS and LCP, particularly in runner and gate design based on resin properties and addressing warpage, shrinkage differences, and dimensional variations.

・ Experience in the design (layout planning, temperature control design) and startup of hot runner molds.

・ Japanese: Native level; advanced business level

・ English: Basic business level

What Will Put You Ahead ・ Practical experience in resin flow analysis.

・ Basic knowledge of connector manufacturing.

・ Candidates with a degree in mechanical engineering and experience in development or mechanical design within the electronics industry.

・ Experience using 3D CAD (NX).

・ Experience in establishing mass production conditions based on DOE and debugging.

At Koch companies, we are entrepreneurs. This means we openly challenge the status quo, find new ways to create value and get rewarded for our individual contributions. Any compensation range provided for a role is an estimate determined by available market data. The actual amount may be higher or lower than the range provided considering each candidate's knowledge, skills, abilities, and geographic location. If you have questions, please speak to your recruiter about the flexibility and detail of our compensation philosophy. Who We Are At Koch, employees are empowered to do what they do best to make life better. Learn how our business philosophy helps employees unleash their potential while creating value for themselves and the company.

Additionally, everyone has individual work and personal needs. We seek to enable the best work environment that helps you and the business work together to produce superior results.