Thermal Engineer, Rack Level

The role

You will own the thermal design and validation of the L11 liquid-cooled rack system. This includes defining deployment processes, validating CDU systems, and supporting facility integration for customers.

What you will do

• Own thermal design and validation of the L11 rack system
• Develop and document deployment, fill, and commissioning processes
• Validate reference CDU systems through lab and field testing
• Characterize rack-level thermal and hydraulic performance
• Define and validate cooling-loop control strategies
• Support GTM and customers as the technical point of contact for facility integration
• Partner with tray and module thermal engineers
• Create and maintain rack thermal specifications and validation reports
• Investigate and resolve thermal and fluid-related issues

Required qualifications

• 5–10 years of experience in thermal or mechanical engineering with direct, hands-on CDU and datacenter liquid cooling experience
• Experience installing, commissioning, or validating liquid cooling systems at datacenter scale
• Experience with CDU validation and commissioning, including flow, pressure, temperature, and controls testing
• Strong working knowledge of datacenter cooling loops and the control systems that run them
• Comfort working directly with customers, facility teams, and suppliers
• Bachelor’s degree in Mechanical Engineering, Thermal Engineering, or a related field

Nice to have

• Experience deploying rack-scale direct-to-chip liquid cooling for AI or HPC systems at a hyperscaler, server OEM, or CDU vendor
• Familiarity with industry guidelines for datacenter liquid cooling, such as OCP and ASHRAE TC 9.9
• Experience with 1D flow network or system-level thermal/hydraulic modeling tools (e.g., Flownex, MacroFlow)
• Knowledge of coolant chemistry, filtration, leak detection, and fluid integrity testing

Benefits

• Medical, dental, and vision packages with generous premium coverage
• $500 per month credit for waiving medical benefits
• Housing subsidy of $2k per month for those living within walking distance of the office
• Relocation support for those moving to San Jose (Santana Row)
• Various wellness benefits covering fitness, mental health, and more
• Daily lunch and dinner in our office
• Unlimited compute budget subject to ROI justification

About the company

Etched is building hardware for frontier intelligence by co-designing chips, racks, software, and manufacturing. They are a fully in-person team in San Jose focused on inference-focused frontier AI systems.