Lambda

Staff Mechanical Engineer - Data Center Cooling

Lambda • $130K — $155K *
San Francisco, CA 94112In-Person
Technical Services
5 - 7 years of experience
Today
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Job Overview by Ladders

Qualifications

  • 5-7 years of experience in designing cooling systems for data centers or industrial environments.
  • Strong understanding of hydronic design, heat transfer, and cooling technologies.
  • Proficient in developing and reviewing P&IDs and engineering calculations.
  • Experience with direct-to-chip liquid cooling and high-density cooling systems.
  • Ability to model system capacity and performance under varying conditions.
  • Excellent communication skills to coordinate with multiple engineering disciplines.
  • Bachelor's degree in mechanical engineering or equivalent experience.

Responsibilities

  • Own and establish cooling-system standards for AI data centers.
  • Design complete thermal paths for GPU and rack cooling.
  • Translate equipment specifications into coolant and facility requirements.
  • Develop innovative cooling architectures for various facility types.
  • Perform necessary calculations for thermal and hydraulic performance.
  • Evaluate system performance against changing conditions and failures.
  • Review partner designs for compliance with company standards.

Benefits

  • Flexible work environment with designated remote work days.
  • Opportunity to work on cutting-edge cooling technologies for AI.
  • Professional development opportunities to enhance engineering skills.
  • Chance to collaborate with top-tier engineering teams on large-scale projects.
  • Involvement in innovative designs for next-generation data centers.
Full Job Description
*Note: This position requires presence in our San Francisco or San Jose office location 4 days per week; Lambda's designated work from home day is currently Tuesday.

What You'll Do
  • Own cooling-system standards and reference architectures for large-scale AI data centers.
  • Design the complete thermal path from GPU and rack heat capture through facility distribution and final heat rejection.
  • Translate server, rack, and cluster requirements into coolant temperature, flow, pressure, water-quality, and facility-capacity requirements.
  • Develop air-cooled, liquid-cooled, and hybrid cooling architectures for greenfield, retrofit, and partner-operated facilities.
  • Design central plants, technology cooling-water loops, CDUs, heat exchangers, pumps, piping, chillers, cooling towers, dry coolers, and adiabatic systems.
  • Perform thermal, hydraulic, pressure-drop, heat-transfer, psychrometric, and equipment-capacity calculations.
  • Evaluate system performance across site climate conditions, compute-load changes, equipment failures, and maintenance scenarios.
  • Develop and review P&IDs, equipment schedules, layouts, specifications, sequence of operation, and basis-of-design documents.
  • Define requirements for redundancy, thermal ride-through, failure isolation, maintainability, efficiency, and water consumption.
  • Establish requirements for coolant chemistry, materials compatibility, filtration, flushing, cleanliness, leak detection, and fluid management.
  • Review partner designs, vendor submittals, equipment selections, and construction documents for compliance with Lambda standards.
  • Coordinate cooling interfaces across hardware engineering, electrical engineering, controls, construction, commissioning, and operations.
  • Support equipment testing, construction sequencing, commissioning, cooling-system bring-up, and initial GPU loading.
  • Investigate thermal events and cooling failures, incorporating lessons into future designs and operating standards.
  • Travel to project sites, manufacturers, and partner facilities as needed.

You
  • Have experience designing cooling systems for data centers, mission-critical facilities, central plants, or large industrial environments.
  • Understand hydronic design, heat transfer, pumping, heat exchangers, chilled-water systems, and heat-rejection equipment.
  • Have experience with direct-to-chip liquid cooling, CDUs, technology cooling-water loops, or other high-density cooling systems.
  • Can develop and review P&IDs, equipment specifications, mechanical layouts, and engineering calculations.
  • Can model system capacity, flow, pressure loss, temperature approach, and performance across varying operating conditions.
  • Understand cooling-system redundancy, failure domains, thermal ride-through, maintainability, and operational risk.
  • Understand the relationship between GPU behavior, rack density, coolant conditions, and facility cooling capacity.
  • Can balance reliability, efficiency, water consumption, equipment cost, and delivery schedule.
  • Communicate clearly across engineering, construction, operations, equipment vendors, and executive stakeholders.
  • Hold a bachelor's degree in mechanical engineering or equivalent practical experience.

Nice to Have
  • Experience designing cooling for hyperscale, colocation, HPC, or AI data centers.
  • Experience supporting multi-megawatt liquid-cooled GPU deployments.
  • Experience with warm-water cooling, water-side economization, dry coolers, or adiabatic heat rejection.
  • Familiarity with CFD, Pipe-Flo, AFT Fathom, Revit, or comparable engineering tools.
  • Knowledge of coolant chemistry, glycol systems, corrosion control, filtration, and wetted-material compatibility.
  • Familiarity with ASHRAE TC 9.9 guidance and liquid-cooling industry standards.
  • Experience with factory testing, commissioning, integrated systems testing, or live system bring-up.
  • Professional Engineer licensure or progress toward licensure.

Salary Range Information

The annual salary range for this position has been set based on market data and other factors. However, a salary higher or lower than this range may be appropriate for a candidate whose qualifications differ meaningfully from those listed in the job description.

About Lambda

Lambda is an online education company that offers courses in computer science and software engineering. The company was founded in 2017 by Austen Allred and Ben Nelson. Lambda's courses are designed to be accessible to anyone, regardless of their background or prior experience. The company's mission is to provide high-quality education that leads to well-paying jobs in the tech industry. Lambda has partnerships with a number of companies, including Amazon, Google, and Microsoft, and has helped thousands of students launch careers in tech.
Learn more about Lambda
Size
1,000 employees
Industry
Education, Government & Non-Profit
Net Income
-$5 million
Founded
2017
5 Year Trend
+100%
Revenue
$100 million
NASDAQ
LMBDA
* Ladders Estimates

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