Reliability Engineer

Reposted 21 Days Ago
Be an Early Applicant
Littleton, MA, USA
In-Office
104K-143K Annually
Senior level
Hardware • Other • Appliances
The Role
Lead reliability engineering for coolant distribution units: develop and maintain reliability models, run DFMEA/PFMEA, design reliability tests, investigate failures, mentor junior engineers, and support NPI.
Summary Generated by Built In
Job Posting Start Date 04-27-2026 Job Posting End Date 06-26-2026

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 Reliability Engineer located in Littleton, MA.

Reporting to the Product Manager the Reliability Engineer will influence design choices, design and maintain reliability evaluation tools to maximize product reliability, and lead DFMEA and PFMEA efforts supporting our coolant distribution units. The position will lead the identification of reliability related test needs, planning, and evaluation. Successful candidates will be comfortable taking on tasks as an individual contributor as well as working together with the team as required to meet project deadlines.

What a typical day looks like:

  • Lead the development of new and the maintenance of existing coolant distribution unit reliability models. 
  • Work with engineering and operations to establish reliability test plans to support the introduction of new products or product updates. 
  • Assist in maintaining a strong best practice culture and driving additional foundational knowledge and IP. 
  • Leading failure root cause investigations. 
  • Provide technical guidance and mentorship to junior engineers, fostering a culture of continuous learning and development. 
  • Participate in design reviews, presenting technical findings and recommendations to internal and external stakeholders. 
  • Support the resolution of technical challenges and issues related to coolant distribution units throughout the product lifecycle. 

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

  • Bachelor of Science degree in Mechanical Engineering or related field. 
  • Minimum of 5 years of post-collegiate experience, preferably working in Testing/ Automation/ Mechanical Engineering
  • Excellent communication skills to help facilitate more complete FMEAs and distill key reliability findings for internal and external stakeholders.
  • Proven experience in NPI process participation and/or leadership. 
  • Design and development of Reliability Plan
  • Fixture Design and creation
  • Experience testing Thermal and fluid systems

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)$104,100.00 USD - $143,100.00 USD Annual

Job CategoryDesign, 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).

Skills Required

  • Bachelor of Science degree in Mechanical Engineering or related field
  • Minimum of 5 years of post-collegiate experience in hardware product reliability
  • Experience in hardware product reliability, preferably in data center cooling, automotive, medical, or nuclear industries
  • Experience leading DFMEA and PFMEA activities
  • Proven experience in NPI process participation and/or leadership
  • Familiarity with data center cooling infrastructure (cooling modules, CDUs, dry coolers, chillers)
  • Experience testing fluid systems
  • Excellent communication skills to present reliability findings and facilitate FMEAs
  • Experience leading failure root cause investigations
  • Ability to design and maintain reliability evaluation tools and models
  • Provide technical guidance and mentorship to junior engineers

Flex Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Flex and has not been reviewed or approved by Flex.

  • Healthcare Strength Health, dental, and vision coverage begin on day one with options for dependents, alongside disability, life, mental‑health resources, and fertility/adoption and gender transition support. Plan choice and wellness programs indicate a robust healthcare offering.
  • Leave & Time Off Breadth Paid holidays, paid sick time, company‑wide shutdown days, and in some cases unlimited PTO point to extensive time‑off provisions. Flexible and hybrid work arrangements in certain teams further support work‑life balance.
  • Strong & Reliable Incentives Quarterly bonus checks and performance bonuses supplement base pay, and some roles can earn overtime at 1.5x. These elements strengthen the reliability of cash incentives.

Flex Insights

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The Company
HQ: Austin, Texas
52,479 Employees
Year Founded: 1969

What We Do

We’re the manufacturing partner of choice that helps a diverse customer base design and build products that improve the world. We love to hear your thoughts, comments and ideas so feel free to like, share and comment away. Any question or opinion is good to go as long as it is respectful and falls within the scope of this page. Derogatory comments, spam and unsolicited selling are not welcome here and such posts will be removed.

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