Job Summary

MONX designs and manufactures rugged industrial lighting systems built to perform in harsh worksite environments. We are looking for a detail-oriented Product Design Engineer to join our R&D team and take ownership of product development, from initial concept through to mass production. You will work on our core product lines – balloon light towers, portable work lights, headlamps and site safety lighting – as well as custom-engineered solutions for special projects.

In this role, you will combine mechanical design, thermal management, optical performance and structural durability to create lighting products that meet international industrial standards and exceed client expectations. You will collaborate closely with sales, production, quality assurance and supply chain teams to ensure designs are manufacturable, cost-effective and reliable in real-world construction and emergency-response conditions. You will also lead continuous improvement initiatives for existing products to enhance performance, reduce waste and extend service life – aligned with our commitment to sustainable, long-lasting industrial equipment.

 

Key Responsibilities

• Conduct full-cycle product design for new industrial lighting products, including concept development, 3D modeling, detailed engineering drawings, tolerance analysis and material selection.

• Perform optical, thermal and structural simulations to validate design performance; optimize LED array layouts, heat dissipation structures, housing designs and ingress protection (IP) ratings for demanding outdoor and worksite environments.

• Build and test functional prototypes, conduct performance verification, environmental testing, vibration testing and durability trials; document test results and implement design iterations accordingly.

• Ensure all new and revised products comply with relevant international standards and certifications, including CE, RoHS, REACH, IP ratings and applicable electrical safety norms.

• Work with the customization team to develop tailored lighting solutions for specific client projects – adjusting mounting options, power inputs, beam angles, control systems and form factors to meet site-specific requirements.

• Collaborate with manufacturing, procurement and quality teams to refine designs for mass production, optimize bill of materials (BOM) costs and resolve production-related technical issues.

• Create and maintain complete technical documentation, including design specifications, assembly drawings, test reports, BOMs and product manuals.

• Monitor industry advancements in LED technology, battery systems, materials and manufacturing processes; propose innovation roadmaps to keep MONX products competitive.

• Support the sales and after-sales teams with technical expertise, including client technical queries, failure analysis and service guideline updates.

 

Requirements

• Bachelor’s degree or higher in Mechanical Engineering, Mechatronics, Optical Engineering or a related discipline.

• Minimum 3 years of hands-on product design experience in industrial lighting, electrical equipment or rugged outdoor devices.

• Proficiency in 3D CAD software (SolidWorks or equivalent) and experience creating detailed production drawings.

• Strong knowledge of LED lighting principles, thermal management, IP sealing design and battery-powered system design.

• Familiarity with international safety standards and certification processes for industrial electrical products.

• Ability to plan and execute prototype testing, analyze data and make evidence-based design decisions.

• Good command of English for reading technical specifications, communicating with overseas suppliers and supporting international clients.

• Strong problem-solving skills, meticulous attention to detail and a systematic approach to engineering work.

• Experience in injection molding, sheet metal design or aluminum extrusion design is a plus.

 

What We Offer

• Competitive salary commensurate with experience and technical expertise.

• R&D project incentives and product performance bonuses.

• Access to advanced testing facilities and professional development opportunities.

• Collaborative work environment in a well-established Korean manufacturing company.

• Opportunity to see your designs deployed on real construction and emergency-response sites worldwide.