Mechanical Process Engineer - Phone Cases (China)
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📱 About Mous
We are Mous. (Pronounced mouse, not moose.) People deserve tech and lifestyle products that are fit for purpose, perform as promised, and empower them to be their best. That’s why we’re building the go-to brand for products that genuinely deliver.
For over 10 years, we’ve pushed product performance to its limits, designing from first principles, validating through real-world testing, and investing millions in R&D. In parallel, we’ve built world-class in-house marketing capabilities, creating highly engaging, performance-led content that proves what our products can do and resonates with a passionate, fast-growing community around the brand.
From throwing phones off dams to launching category-defining products, our ambition is simple: raise the standard of the industry and build one of the most effective consumer brands in the world.
👨💻 About the Role
We’re excited to welcome a Mechanical Process Engineer (CSP – Cases & Screen Protectors) to our growing China-based engineering team.
This role is central to the design and development of Mous phone cases, with a strong focus on structural performance, reliability, and manufacturability.
As an MPE (CSP), you will lead the development of high-performance mechanical structures from concept through mass production. You’ll work closely with cross-functional teams and external manufacturing partners to ensure products meet rigorous validation requirements, scale efficiently, and remain industry-leading.
This is a hands-on, technically demanding role suited to someone who enjoys solving complex engineering challenges in a fast-paced environment.
This position is fully on-site at our Dongguan office, Monday to Friday, 9:00am–6:30pm.
👋 About You
As an MPE at Mous, you’ll collaborate closely with the New Product Development, Engineering, Quality, and Production teams, reporting directly to Colin, our Lead MPE.
You are proactive, detail-oriented, and comfortable owning technical challenges end to end. You thrive in an execution-focused and fast-paced environment and play a key role in driving projects to completion with precision, speed, and quality.
🔑Key Responsibilities:
1.NPI Strategy & Design Optimisation
Partner with the New Product Development (NPD) team to lead DFMA (Design for Manufacturing and Assembly) reviews, ensuring product designs are optimised for durability, manufacturability, cost, and high-volume production.
Apply extensive knowledge in materials, mechanical processes, tooling, and CMF (Color, Material, Finish) to develop feasible engineering solutions aligned with product requirements.
Provide technical assistance during the transition from design to execution, ensuring that aesthetic intent is balanced with manufacturing reality.
2.Technical Vendor & Project Governance
Manage and audit OEM/ODM and manufacturing suppliers, ensuring their technical activities, process controls, and production lines are strictly aligned with the product development roadmap.
Guide product development from conception to execution; manage timelines and milestones to guarantee timely and complete delivery of products and subsequent engineering modifications.
Establish rigorous acceptance criteria for manufacturing processes and materials based on industry’s best practices to ensure supplier output meets internal standards.
3.Validation, Testing & Tooling
Develop comprehensive testing plans that simulate critical requirements and real-world usage scenarios to validate product performance and mechanical integrity.
Design and evaluate precision testing jigs and fixtures, ensuring that validation processes are accurate, repeatable, and effective for mass production environments.
4.Problem Solving & Continuous Improvement
Lead thorough Root Cause Analysis (RCA) on test failures and technical challenges; implement corrective actions to resolve reliability issues related to materials, tooling, or processes.
Identify potential manufacturing risks and technical bottlenecks early in the lifecycle; escalate issues as needed and provide strategic solutions to ensure prompt resolution.
Drive ongoing product enhancements by utilising Customer Experience (CX) and Field Return (FR) data, fostering a culture of quality advancement and continuous improvement.
5.Cost Engineering & Value Realisation
Perform detailed cost analysis for new and existing projects.
Identify and implement cost-saving opportunities through material, tooling, or process optimisation while maintaining product integrity.
✔️How will success be measured?
Year-on-year reduction in average PI ratio
Net 180-day product PI ratio below 2.5%
Effective KPI implementation for lead time in resolving critical issues
Demonstrated year-on-year continuous improvement
🤓Skills requirements:
Experience in phone case design and development or similar consumer electronic products.
Strong background in product design, tooling technologies, materials, and manufacturing processes for phone cases such as over-moulding and co-moulding.
Solid knowledge of engineering plastics such as PC, TPU, TPE, ABS, and PA66. Experience with metals (stamping or die-casting) is a plus.
Experience with post-processing techniques including silk screen, UV coating, PU coating, and assembly.
Strong understanding of DFX related to feasibility, quality, post-processing, and cost evaluation.
Familiarity with testing standards, validation execution, jig design, and failure analysis.
Experience verifying assembly jigs and manufacturing processes.
Strong background in quality control tools such as FAI, SPC, and CPK, including data collection and analysis during mass production.
Proven troubleshooting experience and effective communication with technicians and suppliers.
Proficiency in SolidWorks for mechanical design and simulation.
Soft skills:
Strong communication skills and self-motivation.
Fluent in English.
Collaborative, hands-on, and comfortable working directly on technical issues.
Nice-to-have:
PMP certification
Experience driving continuous product improvement
Understanding of APQP (Advanced Product Quality Planning)
🎉 About Our Offer
We work fully on-site in our custom Dongguan office so that we can retain the collaborative and vibrant Mous culture that people love.
Why work at Mous?
Long-Term Rewards: One month of paid leave after 5 years’ service.
Competitive Pay: A strong starting salary aligned with your experience and impact.
Dynamic Culture: A collaborative, high-performance, data-driven environment where innovation thrives.
Growth & Development: Opportunities to learn, stretch, and grow through new challenges.
Professional Development: Training budget plus regular Mousterclasses to share expertise across teams.
Charlie HR Perks: Access to exclusive perks and discounts via Charlie HR.
Global Collaboration: Seamless remote collaboration with international teams, including weekly all-hands and virtual socials.
🐭 About Our Values
Get Results – We take accountability, prioritise impact, and push standards higher.
Work Together – We collaborate openly, challenge constructively, and learn from each other.
Enjoy the Ride – We stay agile, embrace change, and enjoy building something special together.
🌈 About Our Commitment
Mous is an equal opportunity employer. We celebrate individuality and are committed to building a diverse team with a wide range of experiences, perspectives, and backgrounds.
- Locations
- China Office
- Employment type
- Full-time
