DC/DC Power Electronics Engineer

Amazon Web Services is seeking a DC/DC Power Electronics Engineer to design isolated high-power DC/DC converter stages forming the core of the MV-to-800 VDC SST power-conversion architecture.

As a DC/DC Power Electronics Engineer you will own the DC/DC stage: Designs DAB/CLLC isolated converters at the core of the MV-to-800 VDC chain, delivering a defined stage independently. You will optimize ZVS/ZCS regions, high-frequency modulation, paralleling/current-sharing and efficiency across variable AI/data-center load profiles. You will coordinate with MFT/inductor, front-end and 800 VDC interfaces and validates transient/efficiency/thermal behavior against measurement.

About AIS

AWS Infrastructure Services (AIS) owns the design, planning, delivery, and operation of all AWS global infrastructure. In other words, we’re the people who keep the cloud running. We support all AWS data centers and all of the servers, storage, networking, power, and cooling equipment that ensure our customers have continual access to the innovation they rely on. We work on the most challenging problems, with thousands of variables impacting the supply chain - and we’re looking for talented people who want to help.

You’ll join a diverse team of software, hardware, and network engineers, supply chain specialists, security experts, operations managers, and other vital roles. You’ll 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’ll experience an inclusive culture that welcomes bold ideas and empowers you to own them to completion.

Key job responsibilities

Converter development:

- Design DAB, CLLC and related isolated DC/DC converter architectures.

- Develop high-frequency modulation strategies for high-power operation.

- Optimize ZVS/ZCS operating regions and switching performance.

- Evaluate efficiency across variable AI/data-center load profiles.

System interaction:

- Coordinate DC/DC design with medium-frequency transformer and inductor designs.

- Define electrical interfaces with the AC/DC front end and 800 VDC output.

- Assess paralleling, current sharing and module fault-isolation strategies.

- Support protection and control requirements for the DC/DC stage.

Simulation & validation:

- Use PLECS, PSIM and/or MATLAB/Simulink to model converter behavior.

- Validate transient response, efficiency and thermal performance.

- Correlate simulation with hardware measurements.

- Support prototype testing and design iteration.

SST System Alignment:

- Design the isolated DC/DC stage to support the system 800 Vdc unipolar LVDC interface, including ±0.5% switching ripple, ±1% static regulation and ±3% dynamic regulation targets.

- Support 150%/150 ms fault-protection coordination and 120%/5 s overload capability, subject to final product-level verification.

- Address redundancy, catcher/block architectures, current sharing and LVDC load-profile verification.

A day in the life

As a DC/DC Power Electronics Engineer, your primary focus is designing and optimizing isolated converter architectures that serve as the core of our medium-voltage to 800 VDC power-conversion chain. You'll spend your time developing DAB and CLLC converter designs, using simulation tools like PLECS, PSIM, and MATLAB/Simulink to model converter behavior and validate performance against real-world requirements.

Your day involves collaborating with colleagues across magnetics, thermal, controls, and PCB design to ensure your DC/DC stage integrates seamlessly with the broader system. You'll coordinate electrical interfaces with the AC/DC front end and 800 VDC output, assess paralleling and current-sharing strategies, and support prototype testing to correlate simulation results with hardware measurements. You'll also document design decisions, trade-offs, and technical specifications to ensure clarity across the team and support future iterations.

About the team

We are the team that keeps the cloud running. AWS Infrastructure Services owns the design, planning, delivery, and operation of all AWS global infrastructure-the servers, storage, networking, power, and cooling equipment that ensure our customers have continual access to the innovation they depend on. We work on some of the most challenging problems in the industry, with thousands of variables impacting our supply chain and system performance.

Our team is committed to advancing power-conversion technology to support the next generation of AI and data-center infrastructure. We're building a collaborative environment where engineers from different disciplines-power electronics, magnetics, thermal management, and controls-work together to solve complex technical challenges. You'll be part of a group that values continuous learning, knowledge-sharing, and mentorship as we push the boundaries of what's possible in power electronics. We're excited to welcome someone who can contribute to our vision of delivering efficient, reliable, and scalable power solutions for the future of cloud computing

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 success at work should never come at the expense of sacrifices at home, which is why flexible work hours and arrangements are part of our culture. When we feel supported in the workplace and at home, there’s nothing we can’t achieve in the cloud.

Mentorship & Career Growth

We have a career path for you no matter what stage you’re in when you start here. We’re continuously raising our performance bar as we strive to become Earth’s Best Employer. That’s why you’ll find endless knowledge-sharing, mentorship and other career-advancing resources here to help you develop into a better-rounded professional.

Basic qualifications

- Bachelor's degree in Electrical Engineering,

- Experience with isolated high-power DC/DC converter design.

- Experience with high-voltage power electronics and laboratory validation.

- Demonstrated ability to collaborate with controls, magnetics, thermal and PCB engineers.

- Experience documenting design decisions, assumptions, trade-offs, risks and technical specifications.

Preferred qualifications

- Master's degree or PhD in Electrical Engineering.

- 2+ years experience in isolated high-power DC/DC (DAB/CLLC/LLC) design and validation.

- Demonstrated strong knowledge of DAB/CLLC or comparable resonant/isolated topologies.

- Demonstrated understanding of soft switching, modulation and dynamic response.

- Demonstrated working effectively with adjacent engineering disciplines and contributing to full A-to-Z product ownership.

- Demonstrated operating effectively in a greenfield environment where standards and reference designs may require interpretation and adaptation.

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