Senior Materials Engineer, Liquid Cooling Systems, Hardware Engineering Thermal & Mechanical

Amazon is hiring a Senior Materials Engineer, Liquid Cooling Systems, Hardware Engineering Thermal & Mechanical in Seattle, United States. It pays $159k-$215k a year and Level rates it ; you can apply on Amazon.

Level's read on this job

Level rates this role Little AI ●○○○: aI is not part of the work.
Tools and skills the posting cites include materials science, coolant chemistry and fluid physics.
Level classifies it as a senior role.
Level lists 20,000+ other open roles at Amazon.

AI in this role

Develop next-generation liquid-cooled server platforms and thermal management materials for AWS data centers.

materials-sciencecoolant-chemistryfluid-physicsthermal-managementliquid-cooling

Amazon Web Services (AWS) Hardware Engineering is a leading-edge product development team that creates enterprise compute and storage server designs for our innovative web service and e-commerce technology platforms. Our designs are industry-leading in terms of performance, frugality, and operational excellence, and are critical to the success of the AWS business and the hundreds of thousands of customers who use utility computing today. We are seeking an experienced Materials Engineer with a strong foundation in materials science, chemistry, and fluid physics to build the next generation of our liquid-cooled cloud platforms. Our success depends on our truly innovative server infrastructure; we are handling massive scale and rapid integration of emergent technologies.
You will join a diverse team of software, hardware, and network engineers, supply chain specialists, security experts, operations managers, and other vital roles. You will collaborate with people across AWS to help us deliver the highest standards for safety and security while providing seemingly infinite capacity at the lowest possible cost for our customers. And you will experience an inclusive culture that welcomes bold ideas and empowers you to own them to completion.
Are you interested in developing solutions that have big impact? Are you someone who likes to challenge the status quo and work on developing innovative material solutions for advanced thermal systems? If you are a materials engineer or scientist with expertise in liquid cooling, coolant chemistry, wetted materials, and thermal management, and you are looking for an exciting career in cloud infrastructure, come join a team that constantly seeks ways to build things better and faster for our customers.
AWS is looking for a Sr. Materials Engineer to become part of a mechanical engineering team, responsible for materials selection, qualification, and continuous innovation in liquid cooling systems within our rapidly expanding data center footprint. This role is designed to augment the traditional capabilities of the mechanical engineering team by bringing deep materials science, coolant chemistry, and fluid physics expertise that bridges the gap between mechanical design and chemical engineering.
Our Senior Materials Engineer partners with Mechanical Design Engineers and Chemical Engineers to identify, validate, and ensure continuous quality of the correct materials, coolants, and processes for our Data Center liquid cooling systems. You will serve as the materials science subject matter expert within the mechanical engineering organization, mentoring and upskilling mechanical engineers on materials compatibility, coolant chemistry, and advanced thermal materials. As engineers at Amazon, we are responsible for achieving a world class uptime for our customers. We drive continuous advancements and improvements with our designs, and communicate technical direction to Sr. Management. We seek new ways to enhance the reliability, scalability, and cost effectiveness of our engineering designs. As an engineer at Amazon, you have the ability to drive change and make a substantial impact in the systems our customers rely on.

Key job responsibilities
Identify, evaluate, and qualify coolant formulations (propylene glycol-based, water-based, and advanced coolants) from multiple vendors for current and next-generation liquid-cooled datacenter servers

Own the wetted materials specification and compliance for server hardware and coolant loops, including alloys, plastics, rubbers, elastomers, and sealing materials in contact with cooling fluids

Evaluate and select materials for compatibility within wetted systems, considering long-term chemical interactions between coolants, metals, polymers, and elastomers

Perform and direct thermodynamic and fluid physics calculations for cooling system design, including heat transfer, pressure drop, flow distribution, and system-level thermal stack analysis

Assess coolant additive packages for chemical stability, long-term reliability, biological resistance, and environmental sustainability

Perform materials characterization using spectroscopy and analytical tools including Fourier Transform Infrared Spectroscopy (FTIR), Electron Microscopy (SEM/TEM), Energy Dispersive Spectroscopy (EDS), and Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES)

Mentor and educate mechanical design engineers on materials science fundamentals, coolant chemistry, and materials compatibility as it relates to their hardware designs

Drive materials sustainability initiatives, evaluating environmental impact of coolant chemistries and wetted materials selections

Own end-to-end quality of coolant from manufacturing site through datacenters, collaborating with chemical engineering and supply chain teams

Basic qualifications

- 5+ years of experience in materials science, materials engineering, or chemical engineering with a focus on liquid cooling systems, wetted materials, or coolant chemistry
- Bachelor's degree or higher in Materials Science, Materials Engineering, Chemical Engineering, Mechanical Engineering with a materials concentration, or a closely related field
- Demonstrated experience with coolant formulation evaluation, wetted materials compatibility testing, or thermal fluid system materials selection
- Working knowledge of thermodynamic and fluid physics principles as applied to cooling system design (heat transfer, pressure drop, flow rate calculations)
- Experience with materials characterization techniques (e.g., FTIR, SEM/EDS, ICP-OES, or equivalent analytical methods)

Preferred qualifications

- Experience carrying hardware or datacenter design concepts through exploration, development, and into deployment or mass production
- Experience researching new designs, technologies, and materials for data center or server hardware
- Experience with microfluidic systems, micro-channel cooling, or advanced liquid cooling architectures
- Knowledge of thermal interface materials (TIMs) and their integration within complex thermal stacks
- Experience with advanced coolant technologies including nanomaterial-enhanced fluids (graphene, metal oxide nanoparticles) or next-generation water-based formulations
- Familiarity with elastomer and rubber chemistry as it relates to sealing and compatibility in cooling loops
- Background in materials sustainability, environmental impact assessment of engineering materials, or green chemistry
- Experience in chemical or materials vendor quality management
- Understanding of manufacturing processes for metals, alloys, and engineered plastics (casting, extrusion, injection molding, additive manufacturing)
- Experience mentoring or cross-training engineering teams in materials science fundamentals

Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status.

Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please visit https://amazon.jobs/content/en/how-we-hire/accommodations for more information. If the country/region you’re applying in isn’t listed, please contact your Recruiting Partner.

The base salary range for this position is listed below. Your Amazon package will include sign-on payments and restricted stock units (RSUs). Final compensation will be determined based on factors including experience, qualifications, and location. Amazon also offers comprehensive benefits including health insurance (medical, dental, vision, prescription, Basic Life & AD&D insurance and option for Supplemental life plans, EAP, Mental Health Support, Medical Advice Line, Flexible Spending Accounts, Adoption and Surrogacy Reimbursement coverage), 401(k) matching, paid time off, and parental leave. Learn more about our benefits at https://amazon.jobs/en/benefits.

USA, WA, Seattle - 159,200.00 - 215,300.00 USD annually

How we rate this

Senior Materials Engineer, Liquid Cooling Systems, Hardware Engineering Thermal & Mechanical at Amazon rates 0 out of 100 for how much of the daily work is AI. That makes it Little AI (AI Level 1 of 4). The level is about AI in the job, not seniority.

Classification

Little AI. AI is not part of the work.

●●●● Builds AI80 to 100
●●●○ Works on AI60 to 79
●●○○ Uses AI40 to 59
●○○○ Little AI0 to 39

Levels come from how often the tools, models and workflows of the role are named in the posting itself. Read the description and count the AI tools, models and workflows it names.

Key facts

Senior Materials Engineer, Liquid Cooling Systems, Hardware Engineering Thermal & Mechanical is an open job at Amazon.
Level rates this role AI Level 1 of 4: Little AI.
The listed salary is $159k-$215k a year.
The role is based in US, WA, Seattle.
The job was posted on September 11, 2026.
Seniority: senior.
Applications are handled by Amazon. Apply on Amazon

Prepare for this job

Built from this posting and from similar jobs on Level.

Skills and AI tools this role asks for

Materials ScienceCoolant ChemistryFluid PhysicsThermal ManagementLiquid Cooling

Questions you could be asked

Tell me about a project where materials science was part of your work. What did you do?
Tell me about a project where coolant chemistry was part of your work. What did you do?
Tell me about a project where fluid physics was part of your work. What did you do?
Tell me about a project where thermal management was part of your work. What did you do?
Tell me about a project where liquid cooling was part of your work. What did you do?

Adapt your resume

List these exact terms on your resume: Materials Science, Coolant Chemistry, Fluid Physics, Thermal Management, and Liquid Cooling. An applicant tracking system matches the wording, not the idea.
Attach one line of real, concrete experience to at least one of them. A tool named with nothing behind it rarely survives a human read.

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