Mechanical Development Engineer Job Listing at Flex in Littleton, MA (Job ID WD210288)

Description

Job Posting Start Date 10-22-2025 Job Posting End Date 10-27-2025

At JetCool, a Flex company, we're at the forefront of liquid cooling innovation, delivering advanced solutions that empower our partners in AI and high-performance computing. United by a shared purpose, our teams are pushing the limits of what's possible and tackling complex challenges.

A career at JetCool offers the opportunity to make a real impact by helping build smarter, more sustainable data centers. Together, we're not just advancing technology — we're redefining cooling standards to create a more sustainable tomorrow.

Job Summary JetCool, a Flex company, is seeking to add a Mechanical Development Engineer to our team. The Mechanical Design Engineer will be responsible to collaborate on the mechanical design activity implementing innovative and cost effective product solutions in order to support the organization from prototype development through full-scale production. What a typical day looks like:

• Develop manufacturable mechanical designs to achieve system interface and structural requirements using SOLIDWORKS CAD
• Apply first principles in fluid dynamics, thermodynamics, and heat transfer to analyze design concept thermal performance
• Apply analysis and simulation tools (e.g. thermal and structural FEA, CFD) for product development and refinement
• Implement in-house prototyping tools to generate, evaluate, and select concepts
• Assemble engineering drawings and engage with external vendors to procure parts and hardware
• Design rigorous experiments to verify product specifications and design features

The experience we are looking to add to the team:

• Bachelor of Science (B.S. in mechanical or aerospace engineering) and 5-7+ years work experience, or similar background, in thermal and / or fluids engineering
• Excellent first principles knowledge in fluid dynamics, thermodynamics, and heat transfer
• Comfortable interfacing with fabrication partners and suppliers to deliver high quality parts on time
• Demonstrated ability with hands-on builds/projects
• Proficiency in SOLIDWORKS CAD and drawing packages

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

Pay Range (Applicable to Massachusetts) $80,400.00 USD - $110,600.00 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 accessibility@flex.com 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).

 Apply on company website