Sr. Mechanical Engineer

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Mechanical Engineer page is loaded## Sr. Mechanical Engineer locations:
USA, MA, Littletontime type:
Full time posted on:
Posted Todaytime left to apply:
End Date:
March 27, 2026 (30+ days left to apply) job requisition :
WD213337

Job Posting Start Date 01-20-2026 Job Posting End Date 03-27-2026

At Jet Cool, 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 Jet Cool 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
** Senior Mechanical Engineer
** located in
** Littleton, MA.
** Reporting to the
** Product Manager,
** the
** Senior Mechanical Engineer
** will play a key role in our product development team. This engineer will contribute to the design, analysis, and validation of advanced liquid cooling systems for processors, servers, and rack-level infrastructure.
** What a typical day looks like:
*** Contribute to design and development of liquid cooling components and assemblies, including cold plates, manifolds, tubing, mounting hardware, and heat exchangers.
* Perform mechanical and thermal analysis, including structural modeling, tolerance analysis, and CFD-assisted design input.
* Support prototype builds, functional testing, and iterative design refinement.
* Collaborate closely with electrical, thermal, and fluid systems engineers to optimize cooling performance at the processor, server, and rack levels.
* Apply
** Design for Manufacturing (DFM)
** and
** Design for Assembly (DFA)
** these are best practices to ensure scalable, high‑quality production.
* Work with suppliers, manufacturing teams, and operations to transition designs from prototype to volume manufacturing.
* Create engineering documentation, including drawings, models, BOMs, and specification packages.
* Participate in design reviews and provide technical input to ensure robust, reliable solutions for demanding datacenter environments.
* Stay informed on emerging cooling technologies, industry standards, and datacenter trends.
** The experience we’re looking to add to our team:
*** Bachelor’s degree in mechanical engineering or related field (master’s preferred).
* 6–10 years of mechanical engineering experience, ideally in thermal management, electronics cooling, or complex hardware systems.
* Hands-on experience designing components for liquid cooling systems, such as cold plates, heat exchangers, or fluid distribution systems.
* Familiarity with datacenter thermal challenges, particularly cooling processors, GPUs, and dense computer hardware.
* Proficiency in CAD tools (e.g., Solid Works, Creo) and simulation tools (structural and thermal/CFD).
* Strong understanding of materials, machining, brazing, casting, plastics, and sealing technologies.
* Experience working through prototype, validation, and production release phases of hardware development.
* Excellent problem-solving skills and the ability to work on cross-functional engineering teams.
* Experience with rack-level and row-level…