Top 10 Flex Jobs in Framingham, Ma

Thermofluid Systems Test Engineer
Flex LTD —Littleton, MA
- $126,500 - $173,900 a year
- Full-time
- 7 years
- Analysis skills
- Senior level
- Disability insurance
- Health insurance
Sales Engineer
Flex LTD —Littleton, MA
- $110,100 - $151,400 a year
- Full-time
- 3 years
- Senior level
- Communication skills
- Disability insurance
- Health insurance
Sr. Mechanical Development Engineer
Flex LTD —Littleton, MA
- $105,000 - $144,400 a year
- Full-time
- 7 years
- Bachelor of Science
- Analysis skills
- Disability insurance
- Health insurance
Principal Thermal Mechanical Engineer
Flex LTD —Littleton, MA
- $153,500 - $211,000 a year
- Full-time
- 7 years
- Master's degree
- Analysis skills
- Disability insurance
- Health insurance
Sr. Thermal Systems Engineer
Flex LTD —Littleton, MA
- $126,500 - $173,900 a year
- Full-time
- 5 years
- Bachelor of Science
- Doctor of Philosophy
- Disability insurance
- Health insurance
Director of Product Engineering (Fluid Systems and Thermal Management)
Flex LTD —Littleton, MA
- $177,300 - $243,800 a year
- Full-time
- 11+ years
- Master's degree
- Senior level
- Disability insurance
- Health insurance
Business Development Director - Custom Silicon
Flex LTD —Littleton, MA
- $164,300 - $225,900 a year
- Full-time
- Continuous improvement
- Mentoring
- Senior level
- Disability insurance
- Health insurance
Engineering Product Manager
Flex LTD —Littleton, MA
- $126,500 - $173,900 a year
- Full-time
- Bachelor of Science
- 3 years
- Doctor of Philosophy
- Disability insurance
- Health insurance
Account Executive – Enterprise / OEM
Flex LTD —Littleton, MA
- $111,900 - $153,800 a year
- Full-time
- 5 years
- Business development
- Travel
- Disability insurance
- Health insurance

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Thermofluid Systems Test Engineer

Flex LTD -
Littleton, MA

Apply Now

Job Details

Full-time
$126,500 - $173,900 a year

Benefits

Disability insurance
Health insurance
Dental insurance
Tuition reimbursement
Vision insurance
401(k) matching
Life insurance
Paid sick time

Qualifications

Mechanical valves
Thermal analysis
Experimental data reports
Fluid dynamics
Instrumentation troubleshooting
7 years
Defect resolution root cause analysis
Performance testing in mechanical engineering
Tooling
Test Case Documentation (Quality assurance practices)
Test equipment calibration
Defect analysis
PLC configuration
Laboratory test results documentation
Electrical instrumentation
Automation implementation in engineering
Analysis skills
Design development
System validation
Design engineering
Data interpretation
Developing automated testing protocols
Engineering product development
Industrial pumps
Risk assessment
Technical troubleshooting support
Commissioning phase involvement
Test analysis
Design of mechanical systems
Senior level

Full Job Description

Job Posting Start Date 05-06-2026 Job Posting End Date 08-28-2026

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 Thermofluid Systems Test Engineer located in Littleton, MA.

Reporting to the Mechanical Development Associate Principal Engineer the Thermofluid Systems Test Engineer we are seeking a Thermofluid Systems Test Engineer with strong hands on expertise in thermofluid systems to join our engineering team. This is an execution focused role with clear ownership from early development through qualification and product release.

What a typical day looks like:

Own hands‑on testing of Coolant Distribution Units (CDUs) and related subsystems, including pumps, heat exchangers, tubing, valves, and fluids.
Design, build, instrument, and operate automated thermo-fluid test stands to characterize flow, pressure drop, thermal performance, and system behavior.
Develop and maintain PLC‑based controls, data acquisition, and automation for repeatable, long‑duration, and qualification testing.
Execute test plans, analyze results, and deliver clear, test‑driven feedback to design and systems engineering teams.
Support design reviews and product decisions by translating test data into actionable insights and risk assessments.
Improve lab capability by identifying gaps in tooling, instrumentation, controls, and test coverage for CDU development and validation.
Support troubleshooting and root‑cause investigations across development, qualification, production, and field issues related to thermo-fluid performance.

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

7+ years of hands‑on experience testing and qualifying thermo-fluid systems in data center cooling, automotive, medical, or industrial environments, including direct experience with CDUs or comparable systems.
Strong practical understanding of fluid dynamics, thermodynamics, and heat transfer, applied to test execution and data interpretation.
Demonstrated experience leading performance and qualification testing, including flow, pressure, thermal efficiency, durability, and fault‑mode testing.
Proven ability to design, build, instrument, and commission custom thermo-fluid test stands with pumps, valves, heat exchangers, sensors, and safety interlocks.
Experience developing and executing structured test plans, qualification matrices, and acceptance criteria, with ownership of test execution and results.
Strong data acquisition and analysis skills, including sensor selection, calibration, data logging, and post‑processing.
Proficiency with PLC‑based controls and test automation, including modifying control logic for automated sequences and safe system operation.
Demonstrated ability to troubleshoot complex system‑level issues through hands‑on testing and structured root‑cause analysis.
Ability to clearly document and communicate test plans, results, failures, and margin assessments to engineering teams and senior stakeholders

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) $126,500.00 USD - $173,900.00 USD Annual

Job Category

Design, Process & Technology Engineering

Is Sponsorship Available?

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).

Apply Now

Refine Your Search

flex jobs in framingham, ma

Thermofluid Systems Test Engineer

Sales Engineer

Sr. Mechanical Development Engineer

Principal Thermal Mechanical Engineer

Sr. Thermal Systems Engineer

Director of Product Engineering (Fluid Systems and Thermal Management)

Business Development Director - Custom Silicon

Engineering Product Manager

Account Executive – Enterprise / OEM

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