Senior Thermal-Fluids Engineer – Advanced Cooling

Spain·ZaragozaFull-timesenior

OtherEngineer

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Diamond Foundry Inc. is solving the thermal limitation at the foundation of today's most exciting tech industries -- AI & cloud compute, electric-car power electronics, and 5G/6G wireless.

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OtherEngineer

Diamond Foundry Inc. is solving the thermal limitation at the foundation of today's most exciting tech industries -- AI & cloud compute, electric-car power electronics, and 5G/6G wireless. We have managed to produce the world's first single-crystal diamond wafers and are now on a mission to put a diamond behind every chip. We are the rare unicorn that has grown fast and profitably. We received $515m in funding and are executing a multi-$B expansion plan for one of the greenest forms of tech manufacturing: converting greenhouse gas into diamond wafers using zero-emission energy.

We are looking for a Senior Thermal-Fluids Engineer to lead the development of advanced liquid cooling solutions for the thermal management of state-of-the-art semiconductor processing devices (chips), leveraging single-crystal diamond (SCD) for high-performance heat spreading. This role will focus on designing, prototyping, and experimentally validating high-performance cooling architectures, with particular emphasis on jet impingement, spray and microjet technologies, and high heat-flux heat transfer. You will work hands-on from early concepts and modeling through prototype fabrication, testing, and integration with SCD-based semiconductor systems.

Lead the design and development of high-performance liquid cooling architectures for SCD-based semiconductor thermal management, including jet impingement, spray, and microjet-based concepts.
Model and optimize fluid flow and heat transfer to define jet/nozzle geometries, flow distribution, pressure, temperature, and operating conditions, including single- and two-phase heat transfer regimes.
Design cooling hardware for prototyping and manufacturing, incorporating fluid distribution, extraction/return paths, and micro-machined features while considering practical fabrication constraints.
Build and experimentally characterize prototypes, analyzing thermal and fluid performance and using test results to iterate and improve designs.
Drive the technical development from initial concept through prototype demonstration and integration with SCD-based semiconductor devices, collaborating with internal engineering and manufacturing teams and external research or fabrication partners as needed.

Degree in Mechanical Engineering, Thermal Engineering, Fluid Mechanics, or a related field; an MSc or PhD is highly valued, particularly when combined with applied R&D and prototype development experience.
Strong background in thermal engineering, fluid dynamics, and heat transfer, with experience developing high-performance liquid cooling systems or devices. Experience with Ansys or COMSOL is a plus
Hands-on experience designing and validating thermal-fluid hardware, with exposure to technologies such as jet impingement, spray cooling, microjets/microfluidics, or other high heat-flux cooling approaches.
Experience with computational and/or analytical thermal-fluid modeling, ideally including CFD, combined with experimental testing and validation.
Experience designing components for precision or micro-scale manufacturing processes, such as micromachining, and translating engineering concepts into manufacturable prototypes.

Diamond Foundry believes in supporting our employees from the workplace to their personal and home life. We provide eligible employees with an opportunity to enroll in a variety of benefit programs, generally including health insurance, flexible spending accounts, retirement savings plans, life and disability insurance programs, and a number of programs that provide for both paid and unpaid time away from work. Perks include employee discounts to VRAI. All benefits offered are available starting your first day.

Diamond Foundry is an Equal Opportunity Employer and considers qualified applicants for employment without regard to race, color, creed, religion, national origin, sex, sexual orientation, gender identity and expression, age, disability, veteran status, or any other protected factor under federal, state or local law.