Mechanical Design Engineer

Job Posting Start Date 02-18-2026 Job Posting End Date 04-17-2026

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

To support our extraordinary teams who build great products and contribute to our growth, we're looking to add a Mechanical Design Engineer located in Littleton, MA.

Reporting to the Product Manager the Mechanical Design Engineer is responsible for designing, validating, and implementing innovative and cost-effective product solutions of complex scope to support the organization in prototype development through full-scale production.

What a typical day looks like:

• Apply complex design practices and procedures to assigned product portfolio in areas like sheet metal design/fabrication, soft tooling processes (sheet metal stamping/fabrication, tig/mig/spot welding) and equipment; telecom infrastructure products such as chassis, cabinets, racks, shelving, etc.
• Integrate multiple elements of finished design (such as backplane/interconnect, power distribution, and thermal management).
• Work with other members of the development team to support corporate design initiatives.
• Prepare recommendations for production and technology roadmaps that support customer expectations.
• Assist in generating production and technology roadmaps that support customer expectations
• Support actively customer base with design improvements that enhance manufacturability and assembly while minimizing costs.
• Provide complex technical support to customer base to enhance manufacturability and assembly while minimizing costs.

The experience we're looking to add to our team:

• Typically requires a Bachelor degree in related field or equivalent experience and training.
• Mechanical & Electrical Tools: taps and dies, alignment tools, measuring tools. Office skills: telephones, data entry, office software to include, word processing, spreadsheet and presentation package.
• Impacts operations of immediate work group. Executes and may provide input to functional processes or technologies. Assists in achieving section/sub-function objectives for a functional area.
• Limited decision-making opportunities or responsibilities; makes guided or scenario-based decisions requiring management approval. Provides input for team decisions. Decisions affect team.
• Closely supervised, normally receives detailed instructions on all work.
• Identifies own development needs and works toward them.

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

Pay Range (Applicable to Massachusetts)

$69,300.00 USD - $95,300.00 USD Annual

Job Category
Production 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).

Client-provided location(s): Boxborough, MA

Job ID: Flex-WD215599

Employment Type: FULL_TIME

Posted: 2026-02-19T19:32:04