Junior Mechanical Development Engineer – Liquid Cooling

JETCOOL Technologies Inc.; Littleton (MA); On-site; USD 60,000 - 80,000; Full time

Job summary

JetCool Technologies Inc. in Littleton, MA is seeking a Jr. Mechanical Development Engineer to support design, prototyping, testing, and documentation of liquid-cooling hardware under senior direction.

This early-career role provides exposure to mechanical design, GD&T, FEA, and production readiness, with hands-on opportunities from SolidWorks CAD to test fixtures and verification activities.

Qualifications

• Bachelor’s degree in mechanical engineering or equivalent practical experience.
• 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.

Responsibilities

• 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.

Skills

3D CAD

GD&T

Tolerance analysis

FEA

Prototyping/testing

Hands-on aptitude

Education

Bachelor’s degree in mechanical engineering or equivalent

Tools

SolidWorks

PDM/PLM

Job description

JetCool Technologies Inc. in Littleton, MA is seeking a Jr. Mechanical Development Engineer to support design, prototyping, testing, and documentation of liquid-cooling hardware under senior direction.

This early-career role provides exposure to mechanical design, GD&T, FEA, and production readiness, with hands-on opportunities from SolidWorks CAD to test fixtures and verification activities.