Role : Design Engineer – CDU (Coolant Distribution Unit)

nLocation: Hyderabad / Bangalore

nExperience: 2–8 Years

nCompany: Stealth AI Infrastructure Startup

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nAbout the Role

nWe are building next-generation liquid cooling infrastructure for AI Data Centers , enabling high-density GPU, HPC, and accelerated computing environments.

nWe 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.

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nThis 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.

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nKey Responsibilities

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- Design and develop Coolant Distribution Units (CDUs) for high-density AI/HPC data centers.
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- Develop mechanical architecture for CDU systems including pumps, heat exchangers, valves, manifolds, filters, expansion tanks, sensors, piping, fittings, and control components .
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- Create detailed 3D CAD models, assemblies, drawings, BOMs, and manufacturing documentation .
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- Develop and maintain P&IDs;, system schematics, flow diagrams, and mechanical layouts .
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- Perform thermal and hydraulic calculations for flow rate, pressure drop, heat load, heat exchanger sizing, pump selection, and system performance.
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- Select and evaluate pumps, heat exchangers, valves, sensors, actuators, quick disconnects, hoses, pipes, and other fluid-system components.
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- Design manifolds, piping systems, brackets, enclosures, frames, and sheet-metal/fabricated components .
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- Work with CFD/thermal engineering teams to optimize CDU flow distribution, pressure drop, heat transfer, and thermal performance.
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- Design products considering Design for Manufacturing (DFM), Design for Assembly (DFA), serviceability, reliability, and cost .
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- Develop prototypes and coordinate with vendors and manufacturing teams for fabrication and assembly.
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- Conduct pressure, leak, flow, thermal, vibration, and functional testing of CDU prototypes.
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- Analyze test results and implement design improvements through iterative engineering cycles.
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- Prepare engineering documentation including drawings, specifications, BOMs, test procedures,



validation reports, and design change documentation .
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- Work closely with thermal, electrical, controls, manufacturing, quality, sourcing, and product teams .
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- Support transition of CDU designs from prototype to pilot production and mass manufacturing .
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- Evaluate suppliers and review manufacturing capabilities for pumps, heat exchangers, manifolds, piping, sheet metal, machining, welding, and other components.
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- Support root-cause analysis and resolution of field and prototype failures.
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nRequired Qualifications

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- B.E./B.Tech/M.Tech in Mechanical Engineering, Thermal Engineering, Aerospace Engineering, Energy Engineering , or a related discipline.
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- 4–8 years of experience in mechanical/product design, thermal systems, fluid systems, HVAC, heat exchangers, electronics cooling, or related engineering domains.
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- Strong fundamentals in:
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- Fluid Mechanics
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- Heat Transfer
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- Thermodynamics
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- Hydraulic Systems
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- Thermal Management
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- Mechanical Design
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- Solid hands-on experience with 3D CAD such as SolidWorks, Creo, Siemens NX, CATIA, or equivalent.
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- Experience creating 2D manufacturing drawings, GD&T;, BOMs, assemblies, and engineering documentation .
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- Experience with P&ID; / fluid-system design and selection of fluid-system components.
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- Understanding of pressure drop, flow distribution, pump curves, heat exchanger performance, and system-level thermal calculations .
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- Experience working with manufacturing vendors and converting engineering designs into physical prototypes.
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- Strong problem-solving and analytical skills.
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- Ability to work hands-on in a fast-paced product-development environment.
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nPreferred Experience

nExperience in one or more of the following areas will be highly valuable:

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- Coolant Distribution Unit (CDU) design
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- Direct-to-Chip Liquid Cooling
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- Data Center Cooling
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- AI / HPC Infrastructure
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- Cold Plate Design
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- Liquid Cooling Loops
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- Heat Exchanger Design
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- HVAC / Chiller Systems
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- Electronics / Semiconductor Cooling
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- Power Electronics Cooling
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- Pump and Hydraulic System Design
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- Manifold and Piping Design
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- Sheet Metal / Fabrication / Machining
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- DFM / DFA
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- CFD using ANSYS Fluent, STAR-CCM+, COMSOL , or equivalent
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- Experience with water-glycol or other engineered coolant systems
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- Experience with quick disconnects, hoses, fittings, valves, sensors, and fluid connectors
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nTechnical Skills

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nMechanical Design:

nSolidWorks / Creo / NX / CATIA

nEngineering Analysis:

nThermal calculations, hydraulic calculations, pressure-drop analysis, pump sizing, heat exchanger sizing

nSimulation:

nANSYS Fluent / STAR-CCM+ / COMSOL or equivalent

nEngineering Documentation:

nGD&T;, 2D drawings, BOM, P&ID;, assembly drawings, design specifications

nManufacturing:

nMachining, sheet metal, welding, brazing, fabrication, DFM/DFA and prototype development

nWhat You'll Build

nYou will work on the engineering of next-generation CDU platforms designed to support high-density GPU and AI infrastructure .

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nYou will have the opportunity to work across the complete product lifecycle — from concept and CAD design to prototype, testing, manufacturing, and deployment .

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nWhy Join Us?

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- Build next-generation liquid cooling technology for AI Data Centers .
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- Work on products designed for high-density GPU and HPC infrastructure .
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- Solve challenging problems across thermal engineering, fluid dynamics, mechanical design, and manufacturing .
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- Work directly on real hardware and prototypes , not just simulations.
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- High ownership and opportunity to influence the product architecture.
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- Work alongside experienced engineers across AI infrastructure, thermal engineering, mechanical design, and manufacturing .
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- Opportunity to build products for the rapidly growing AI infrastructure and data center market .
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nIf 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) (Ranchi)
🏢 Stealth AI Startup
📍 Ranchi