Mechanical Development Engineer
Role Overview
To support our extraordinary teams who build great products and contribute to our growth, we’re looking to add a Jr.
Mechanical Development Engineer located in Littleton, MA.
Reporting to the Product Manager the Jr.
Mechanical Development Engineer will supports the design, prototyping, testing, and documentation of system-level liquid-cooling hardware.
Working under senior technical direction, this early-career engineer gains broad exposure to mechanical design, system integration, testing, and production readiness.
What a typical day looks like:
• Create and modify SolidWorks parts, assemblies, drawings, and BOMs.
• Support the design of brackets, tubing routes, mounts, manifolds, enclosures, and test fixtures.
• Integrate pumps, radiators, hoses, fittings, sensors, and server hardware.
• Apply GD&T and perform tolerance analysis with senior review.
• Conduct SolidWorks FEA under appropriate technical guidance.
• Assemble, instrument, and test engineering prototypes.
• Support pressure, leak, flow, thermal, vibration, and endurance testing.
• Analyze data and document configurations, results, and design changes.
• Participate in troubleshooting, teardown, and failure analysis.
• Support engineering changes, work instructions, supplier activities, and production builds.
The experience we’re looking to add to our team:
• Bachelor’s degree in mechanical engineering or equivalent practical experience.
• Typically 0 to 3 years of relevant experience.
• Foundational proficiency in 3D CAD, preferably SolidWorks.
• Familiarity with engineering drawings, GD&T, tolerance analysis, FEA, materials, and manufacturing methods.
• Strong hands-on aptitude and interest in building and testing hardware.
• Internship, co-op, robotics, Formula SAE, aerospace, fluid-system, or similar project experience preferred.
• Exposure to PDM/PLM systems or liquid-cooling equipment is beneficial.
• Assigned designs and documentation are accurate and timely.
• Prototypes are assembled and tested safely.
• Results and design changes are clearly documented.
• The engineer progressively assumes larger, more independent assignments.
Full Job Posting
To support our extraordinary teams who build great products and contribute to our growth, we’re looking to add a Jr. Mechanical Development Engineer located in Littleton, MA.
Reporting to the Product Manager the Jr. Mechanical Development Engineer will supports the design, prototyping, testing, and documentation of system-level liquid-cooling hardware. Working under senior technical direction, this early-career engineer gains broad exposure to mechanical design, system integration, testing, and production readiness.
What a typical day looks like:
Create and modify SolidWorks parts, assemblies, drawings, and BOMs.
Support the design of brackets, tubing routes, mounts, manifolds, enclosures, and test fixtures.
Integrate pumps, radiators, hoses, fittings, sensors, and server hardware.
Apply GD&T and perform tolerance analysis with senior review.
Conduct SolidWorks FEA under appropriate technical guidance.
Assemble, instrument, and test engineering prototypes.
Support pressure, leak, flow, thermal, vibration, and endurance testing.
Analyze data and document configurations, results, and design changes.
Participate in troubleshooting, teardown, and failure analysis.
Support engineering changes, work instructions, supplier activities, and production builds.
The experience we’re looking to add to our team:
Bachelor’s degree in mechanical engineering or equivalent practical experience.
Typically 0 to 3 years of relevant experience.
Foundational proficiency in 3D CAD, preferably SolidWorks.
Familiarity with engineering drawings, GD&T, tolerance analysis, FEA, materials, and manufacturing methods.
Strong hands-on aptitude and interest in building and testing hardware.
Internship, co-op, robotics, Formula SAE, aerospace, fluid-system, or similar project experience preferred.
Exposure to PDM/PLM systems or liquid-cooling equipment is beneficial.
Assigned designs and documentation are accurate and timely.
Prototypes are assembled and tested safely.
Results and design changes are clearly documented.
The engineer progressively assumes larger, more independent assignments.
BO18
What you'll receive for the great work you provide:
Full range of medical, dental, and vision plans
Life Insurance
Short-term and Long-term Disability
Matching 401(k) Contributions
Vacation and Paid Sick Time
Tuition Reimbursement
Application Deadline:
Applications for this job position will be accepted for at least five days following the job posting start date below and continuing until the end date below or until the position is filled. This posting may close sooner due to application volume.
Job Posting Start Date 10-18-2026 Job Posting End Date 12-31-2026
The base pay range for this position is provided below. The final base rate offered will be determined using job-related, non-discriminatory criteria, including but not limited to experience, qualifications, geographic location, education, external market data, and internal equity.
$70,500.00 USD - $97,000.00 USD Annual
Job Category
Design, Process & Technology Engineering
Is Sponsorship Available?
No
JetCool is an Equal Opportunity Employer and employment selection decisions are based on merit, qualifications, and abilities. We do not discriminate based on: age, race, religion, color, sex, national origin, marital status, sexual orientation, gender identity, veteran status, disability, pregnancy status, or any other status protected by law. We're happy to provide reasonable accommodations to those with a disability for assistance in the application process. Please email [email protected] and we'll discuss your specific situation and next steps (NOTE: this email does not accept or consider resumes or applications. This is only for disability assistance. To be considered for a position at JetCool, you must complete the application process first).
Qualifications
- Bachelor’s degree in mechanical engineering or equivalent practical experience.
- Familiarity with engineering drawings, GD&T, tolerance analysis, FEA, materials, and manufacturing methods.
About Flex
Global manufacturing partner providing design, engineering, and supply chain solutions.
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