# CFD/Thermal Simulation Engineer at Amazon

Amazon is hiring a CFD/Thermal Simulation Engineer in Lille, France. Level rates it Little AI ●○○○; you can [apply on Amazon](https://jobsbylevel.com/go/8dfae352-7f16-460a-a558-b30e25173c98?utm_medium=ai-agent).

AI Level 1, AI centrality 34 out of 100. FR, Lille.

## Details

- Company: [Amazon](https://jobsbylevel.com/companies/amazon)
- AI level: AI Level 1 (score 34 out of 100)
- Location: FR, Lille
- Posted: October 29, 2026
- Apply: https://jobsbylevel.com/go/8dfae352-7f16-460a-a558-b30e25173c98?utm_medium=ai-agent
- Free CV review for this job: https://jobsbylevel.com/cv-review?job=cfd-thermal-simulation-engineer-at-amazon-6865d4

## Description

Amazon Web Services is seeking a CFD/Thermal Simulation Engineer to develop thermal and CFD models to predict, optimize and validate the thermal performance of the 5–10 MW SST. As a CFD/Thermal Simulation Engineer you will build 3D CFD (Icepak / Fluent / COMSOL / Simcenter) and thermal-resistance models predicting SST thermal performance on a defined project. You will handle conjugate heat transfer, mesh/fidelity trade-offs, hotspot prediction and junction-margin analysis under variable load and correlate to measurement and feed optimized designs to thermal/mechanical and PE teams. Key job responsibilities CFD modeling: - Build 3D thermal simulations using Icepak, ANSYS Fluent, COMSOL, Simcenter or equivalent tools. - Model heat transfer through power electronics, cooling interfaces and system assemblies. - Evaluate thermal distribution, hotspots and cooling-system performance. Thermal modeling: - Develop thermal-resistance models and junction-to-coolant analyses. - Support semiconductor and component thermal-margin definition. - Analyze thermal behavior under variable load profiles. Correlation & optimization: - Correlate simulation results with experimental measurements. - Use test results to refine models and identify design improvements. - Support thermal design optimization with Mechanical and Power Electronics teams. SST System Alignment: - Model system environmental conditions and thermal derating, including -30°C to 40°C ambient and above-40°C derating requirements. - Correlate thermal models with efficiency, load-profile and qualification data across the SST operating envelope. A day in the life As a CFD/Thermal Simulation Engineer, you'll focus on building sophisticated 3D thermal simulations that predict how heat flows through power electronics and cooling systems. Your day might include developing conjugate heat transfer models using tools like Icepak, ANSYS Fluent, COMSOL, or Simcenter, then correlating your simulation results with real laboratory measurements to refine designs. You'll collaborate with mechanical and power electronics teams to identify hotspots, analyze thermal behavior under different operating conditions, and translate your findings into actionable design improvements. You'll also work across variable environmental conditions—from extreme cold to high ambient temperatures—ensuring systems perform reliably throughout their operating envelope. About the team We are AWS Infrastructure Services, the team that keeps the cloud running. We design, plan, deliver, and operate all AWS global infrastructure—the servers, storage, networking, power, and cooling equipment that enable our customers' success. Our team tackles some of the most complex thermal and infrastructure challenges in the industry, where thousands of variables impact performance and reliability. We're building a collaborative environment where you'll partner with talented engineers across disciplines, contribute to full product ownership from concept to deployment, and help shape the future of how we cool and power the world's cloud infrastructure. You'll be part of a group that values continuous learning, embraces diverse perspectives, and supports your growth as you solve problems that matter at scale. Why AWS? Amazon Web Services (AWS) is the world’s most comprehensive and broadly adopted cloud platform. We pioneered cloud computing and never stopped innovating — that’s why customers from the most successful startups to Global 500 companies trust our robust suite of products and services to power their businesses. Inclusive Team Culture Here at AWS, it’s in our nature to learn and be curious. Our employee-led affinity groups foster a culture of inclusion that empowers us to celebrate our differences. Ongoing events and learning experiences, including our Conversations on Race and Ethnicity (CORE) and diversity conferences, inspire us to never stop embracing our uniqueness. Work/Life Balance We value work-life harmony. Achieving

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Source: https://jobsbylevel.com/jobs/cfd-thermal-simulation-engineer-at-amazon-6865d4

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