Stealth AI Startup

Role :
Design Engineer – CDU (Coolant Distribution Unit)
Location:
Hyderabad / Bangalore
Experience:
2–8 Years
Company:
Stealth AI Infrastructure Startup
About the Role
We are building next-generation
liquid cooling infrastructure for AI Data Centers
, enabling high-density GPU, HPC, and accelerated computing environments.
We are looking for a
Design Engineer – CDU
to own the mechanical design and product development of
Coolant Distribution Units (CDUs)
and associated liquid-cooling systems.
This role will work across
concept development, CAD design, thermal and hydraulic engineering, component selection, prototyping, testing, DFM/DFA, and manufacturing
to take CDU products from engineering concept to production.
Key Responsibilities
<ul>
<li>Design and develop
Coolant Distribution Units (CDUs)
for high-density AI/HPC data centers.</li>
<li>Develop mechanical architecture for CDU systems including
pumps, heat exchangers, valves, manifolds, filters, expansion tanks, sensors, piping, fittings, and control components
.</li>
<li>Create detailed
3D CAD models, assemblies, drawings, BOMs, and manufacturing documentation
.</li>
<li>Develop and maintain
P&amp;IDs, system schematics, flow diagrams, and mechanical layouts
.</li>
<li>Perform
thermal and hydraulic calculations
for flow rate, pressure drop, heat load, heat exchanger sizing, pump selection, and system performance.</li>
<li>Select and evaluate pumps, heat exchangers, valves, sensors, actuators, quick disconnects, hoses, pipes, and other fluid-system components.</li>
<li>Design
manifolds, piping systems, brackets, enclosures, frames, and sheet-metal/fabricated components
.</li>
<li>Work with CFD/thermal engineering teams to optimize CDU flow distribution, pressure drop, heat transfer, and thermal performance.</li>
<li>Design products considering
Design for Manufacturing (DFM), Design for Assembly (DFA), serviceability, reliability, and cost
.</li>
<li>Develop prototypes and coordinate with vendors and manufacturing teams for fabrication and assembly.</li>
<li>Conduct
pressure, leak, flow, thermal, vibration, and functional testing
of CDU prototypes.</li>
<li>Analyze test results and implement design improvements through iterative engineering cycles.</li>
<li>Prepare engineering documentation including
drawings, specifications, BOMs, test procedures, validation reports, and design change documentation
.</li>
<li>Work closely with
thermal, electrical, controls, manufacturing, quality, sourcing, and product teams
.</li>
<li>Support transition of CDU designs from prototype to
pilot production and mass manufacturing
.</li>
<li>Evaluate suppliers and review manufacturing capabilities for pumps, heat exchangers, manifolds, piping, sheet metal, machining, welding, and other components.</li>
<li>Support root-cause analysis and resolution of field and prototype failures.</li>
</ul>
Required Qualifications
<ul>
<li>B.E./B.Tech/M.Tech in
Mechanical Engineering, Thermal Engineering, Aerospace Engineering, Energy Engineering
, or a related discipline.</li>
<li>4–8 years of experience
in mechanical/product design, thermal systems, fluid systems, HVAC, heat exchangers, electronics cooling, or related engineering domains.</li>
<li>Strong fundamentals in:</li>
<li>Fluid Mechanics</li>
<li>Heat Transfer</li>
<li>Thermodynamics</li>
<li>Hydraulic Systems</li>
<li>Thermal Management</li>
<li>Mechanical Design</li>
<li>Strong hands-on experience with
3D CAD
such as SolidWorks, Creo, Siemens NX, CATIA, or equivalent.</li>
<li>Experience creating
2D manufacturing drawings, GD&amp;T, BOMs, assemblies, and engineering documentation
.</li>
<li>Experience with
P&amp;ID / fluid-system design
and selection of fluid-system components.</li>
<li>Understanding of
pressure drop, flow distribution, pump curves, heat exchanger performance, and system-level thermal calculations
.</li>
<li>Experience working with manufacturing vendors and converting engineering designs into physical prototypes.</li>
<li>Strong problem-solving and analytical skills.</li>
<li>Ability to work hands-on in a fast-paced product-development environment.</li>
</ul>
Preferred Experience
Experience in one or more of the following areas will be highly valuable:
<ul>
<li>Coolant Distribution Unit (CDU) design</li>
<li>Direct-to-Chip Liquid Cooling</li>
<li>Data Center Cooling</li>
<li>AI / HPC Infrastructure</li>
<li>Cold Plate Design</li>
<li>Liquid Cooling Loops</li>
<li>Heat Exchanger Design</li>
<li>HVAC / Chiller Systems</li>
<li>Electronics / Semiconductor Cooling</li>
<li>Power Electronics Cooling</li>
<li>Pump and Hydraulic System Design</li>
<li>Manifold and Piping Design</li>
<li>Sheet Metal / Fabrication / Machining</li>
<li>DFM / DFA</li>
<li>CFD using
ANSYS Fluent, STAR-CCM+, COMSOL
, or equivalent</li>
<li>Experience with
water-glycol or other engineered coolant systems</li>
<li>Experience with
quick disconnects, hoses, fittings, valves, sensors, and fluid connectors</li>
</ul>
Technical Skills
Mechanical Design:
SolidWorks / Creo / NX / CATIA
Engineering Analysis:
Thermal calculations, hydraulic calculations, pressure-drop analysis, pump sizing, heat exchanger sizing
Simulation:
ANSYS Fluent / STAR-CCM+ / COMSOL or equivalent
Engineering Documentation:
GD&amp;T, 2D drawings, BOM, P&amp;ID, assembly drawings, design specifications
Manufacturing:
Machining, sheet metal, welding, brazing, fabrication, DFM/DFA and prototype development
What You'll Build
You will work on the engineering of
next-generation CDU platforms designed to support high-density GPU and AI infrastructure
.
You will have the opportunity to work across the complete product lifecycle — from
concept and CAD design to prototype, testing, manufacturing, and deployment
.
Why Join Us?
<ul>
<li>Build
next-generation liquid cooling technology for AI Data Centers
.</li>
<li>Work on products designed for
high-density GPU and HPC infrastructure
.</li>
<li>Solve challenging problems across
thermal engineering, fluid dynamics, mechanical design, and manufacturing
.</li>
<li>Work directly on
real hardware and prototypes
, not just simulations.</li>
<li>High ownership and opportunity to influence the product architecture.</li>
<li>Work alongside experienced engineers across
AI infrastructure, thermal engineering, mechanical design, and manufacturing
.</li>
<li>Opportunity to build products for the rapidly growing
AI infrastructure and data center market
.</li>
</ul>
If you are excited about building physical infrastructure for the AI era and enjoy taking engineering concepts from CAD to working hardware, we would like to hear from you.

Design Engineer – CDU (Coolant Distribution Unit)

Design Engineer – CDU (Coolant Distribution Unit)

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