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

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



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

Required Qualifications

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

Preferred Experience

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

- Coolant Distribution Unit (CDU) design
- Direct-to-Chip Liquid Cooling




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

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&T;, 2D drawings, BOM, P&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?

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

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) (Kannur)
🏢 Stealth AI Startup
📍 Kannur