Sr. Mechanical Engineer, Annapurna Labs, Artificial Intelligence Hardware

Annapurna Labs (our organization within AWS) designs silicon and software that accelerates innovation. Customers choose us to create cloud solutions that solve challenges that were previously unimaginable. Our custom chips, accelerators, and software stacks enable us to tackle unprecedented technical challenges and deliver results that help our customers change the world.

About the role

As a member of the Annapurna ML/AI Mechanical Thermal Engineering team, you'll own the end-to-end thermal and mechanical architecture for ML/AI accelerator platforms — from initial concept through production deployment and ongoing fleet operations. You'll design mechanical and cooling solutions for some of the highest power-density silicon in the industry, balancing performance, reliability, cost, and operational efficiency at massive scale. This role requires operating in ambiguity and at a fast pace, collaborating across silicon design, electrical engineering, firmware, manufacturing, supply chain, and operations teams to deliver platforms that power AWS ML/AI services globally.

Responsibilities

• Platform Ownership
  • Own the complete thermal and mechanical design for ML/AI accelerator platforms — from rack-level infrastructure down to chip packaging, including mechanical packaging, structural integrity, and interconnect systems.
  • Define thermal and mechanical design requirements, establish design targets, and drive cross-functional alignment that enables parallel development across hardware, firmware, and software teams.
  • Deliver production platforms through the full lifecycle: concept, design, analysis, prototyping, validation, manufacturing ramp, and fleet operations.
• Thermal & Mechanical Design
  • Design and optimize cooling solutions (air and liquid) for high-power-density ML/AI accelerators.
  • Develop detailed CFD models, compact RC models, and structural FEA for SoC/package thermal analysis and mechanical integrity.
  • Design rack manifolds, cold plates, and data center liquid cooling interfaces for at-scale liquid-cooled deployments.
  • Develop and validate mechanical structures including chassis and enclosures for manufacturability, reliability, and serviceability, owning tolerance stack-up analysis, GD&T, and DFM for high-volume manufacturing methods (stamping, bending, extrusion, die-casting).
  • Own mechanical design of high-speed interconnect subsystems including cable cartridges, backplane connectors, and mating interfaces — defining alignment, gatherability, insertion force, and serviceability requirements.
  • Perform structural FEA for shock, vibration, and transportation loads to ensure mechanical integrity across the product lifecycle.
• Fleet Operations & Reliability
  • Participate in on-call rotations monitoring fleet thermal telemetry for emergent issues.
  • Perform root cause analysis of thermal and mechanical failures in production, implementing firmware updates, hardware modifications, or operational procedure changes.
• Cross-Functional Leadership
  • Drive design standardization.
  • Engage with ODMs and component suppliers to drive design optimization, cost reduction, and supply chain resilience.
  • Lead design reviews, mentor junior engineers, and contribute to the technical direction of the broader organization.
  • Influence chip packaging decisions and establish validation methodologies.

About the team

In 2015, Annapurna Labs was acquired by Amazon Web Services (AWS). Since then, we have developed products that power every layer of the AWS cloud, including AWS Nitro, Graviton processors, and custom ML/AI accelerators — Trainium for training and Inferentia for inference — that enable customers to build and run generative AI applications at scale. The ML/AI MTE team is part of the Annapurna ML/AI hardware development organization. We design and deliver the thermal and mechanical systems for every generation of custom ML/AI accelerator hardware — from chip package through rack-level infrastructure. Our platforms operate at massive scale across AWS data centers globally, with current programs including next-generation Trainium and Inferentia systems featuring liquid cooling at scale.

Requirements

• BS degree in mechanical engineering or equivalent.
• 7+ years industry experience in Mechanical and Thermal design in electronics packaging.
• Experience in thermal and performance measurements and characterization on SoCs, Servers, or related Systems.
• 3+ years of experience in SoC Thermal modelling and IC package transient thermal response.
• Experience with chip package, system mechanical & thermal design for air-cooled and liquid-cooled systems.
• Experience with tolerance analysis (stack-up/GD&T) and sheet metal or precision-machined component design for electronics packaging.
• Experience with production fleet support: telemetry analysis, root cause analysis, and defining mitigation strategies.
• Experience leading cross-functional technical projects spanning silicon, firmware, mechanical, and operations teams.

Preferred Qualifications

• Knowledge of generic mechanical room infrastructure such as chillers, cooler units, and fan controls.
• Experience in mentoring, leading, or managing more junior engineers.
• Knowledge of SoC thermal/mechanical design methodology, power modeling and thermal analysis techniques.
• Tool familiarity: Ansys Icepak, FloTherm, Cadence Celsius, PTC Creo, and Solidworks.
• Proficiency in 3D CAD modeling and engineering drawings per ASME Y14.5 (GD&T) standards.
• Programming experience: Bash script, Shell script, Linux, Python, and Lua. Familiarity with working in a Linux environment.
• Knowledge of various types of technologies used for heatsink solutions, Thermal Interface Materials (TIMs), and liquid cooling technologies.
• Knowledge of hardware and software based thermal/power management control algorithms.
• Experience with liquid cooling system design: rack manifolds, cold plates, quick-disconnect fittings, CDU integration.
• Experience with mechanical design of high-density interconnect systems (cable cartridges, blind-mate connectors, backplane assemblies).
• Experience with high-power-density ML/AI accelerator or HPC thermal design.
• Track record of driving cost optimization through vendor strategy, second-sourcing, or design-for-manufacturing improvements.
• Familiarity with manufacturing processes: injection molding, sheet metal fabrication, die-casting, and CNC machining — including trade-offs between methods.
• Experience with shock, vibration, and structural qualification testing per ISTA, ASTM, or equivalent standards.

Pay

• USA, CA, Cupertino: $183,000.00 - $247,600.00 USD annually
• USA, TX, Austin: $159,200.00 - $215,300.00 USD annually
• USA, WA, Seattle: $159,200.00 - $215,300.00 USD annually

Benefits

Amazon offers comprehensive benefits including:

• Health insurance (medical, dental, vision, prescription, Basic Life & AD&D insurance, and optional supplemental life plans).
• Employee Assistance Program (EAP) and Mental Health Support.
• Medical Advice Line.
• Flexible Spending Accounts.
• Adoption and Surrogacy Reimbursement coverage.
• 401(k) matching.
• Paid time off and parental leave.
• Sign-on payments and restricted stock units (RSUs).

Learn more about our benefits at amazon.jobs/en/benefits.