Senior Power Electronics Design Engineer, Magnetics

Amperesand; San Francisco (CA); On-site; USD 175,000 - 205,000; Full time

Benefits offered by this job

Stock options

Medical benefits

401k

Job summary

Amperesand seeks a senior Power Electronics Engineer with a strong magnetics design background to develop advanced power conversion hardware for critical energy systems. You will design isolated stages, optimize losses, and ensure safety compliance for MV/LV systems.

You will work with SiC/GaN devices, perform high-frequency magnetics design, and validate through simulations and tests, collaborating closely with mechanical, manufacturing and test teams to deliver robust solutions.

Qualifications

• MS or PhD required in Power Electronics, Electromagnetics or related field.
• 4+ years' experience in magnetics design and power conversion design.
• Strong fundamentals in electromagnetics and material properties.
• Experience with SiC/GaN devices in high power density designs.
• Good understanding of loss mechanisms in semiconductors and high-frequency magnetics.
• Knowledge of MV insulation coordination and high voltage testing (Hi-pot, Partial Discharge).
• Knowledge of EMI/EMC test standards (IEC, UL).
• Strong analytical skills to interpret simulations and test data.
• Excellent English written and verbal communication.
• Willingness to travel up to 10%, including internationally.

Responsibilities

• Design isolated and non-isolated converter stages using topologies such as multi-level converters and DAB.
• Perform trade-off analysis to balance loss, cost, and size across components.
• Design magnetics meeting safety, isolation, and thermal standards.
• Develop high-voltage isolation strategies for LV-MV domains.
• Use FEA simulations to guide magnetics and PCBA designs.
• Collaborate with mechanical, manufacturing and test teams across full development cycle.
• Own design validation of magnetics components to meet performance targets.

Skills

Power electronics fundamentals

Magnetics design

High-frequency design

SiC/GaN devices

EMI/EMC knowledge

Analytical skills

English communication

Education

MS/PhD in Power Electronics or related field

Tools

FEA simulations

Hi-pot testing

Partial Discharge testing

IEC/UL standards knowledge

Job description

Company Overview

Amperesand is reinventing how the world powers its most critical systems.

We are facing a once-in-a-generation opportunity for infrastructure disruption. Electricity demand is skyrocketing, driven by AI factories, electric vehicles, and modern industrial growth. Energy supply is shifting to incorporate a more diverse mix of resources - including solar, gas, and batteries - at a massive scale.

And yet the power infrastructure behind our latest mega-projects hasn't meaningfully changed in nearly 100 years. Supply chains for today's infrastructure equipment can’t match the pace and sophistication of critical energy projects. Amperesand is building hardware and software that rewrites this broken power infrastructure playbook to support a new era of energy abundance.

We've built a new class of intelligent, software-defined power infrastructure products leveraging a decade of advanced medium voltage Solid State Transformer research that's now ready for commercial deployment.

Our products and solutions go far beyond the capabilities of traditional electrical equipment. We make power systems that are faster to deploy, dramatically smaller and more efficient, and capable of supporting modern, dynamic energy needs for tomorrow's most demanding energy consumers.

Scalable in-house advanced manufacturing capability is our foundation for meeting timeline and quality expectation to serve infrastructure customers around the world.

Amperesand is led by breakthrough energy hardware development veterans and funded by top tier investors who share our vision of building a category-defining energy technology company.

With hubs in San Francisco, Reno, and Singapore, our global team is laser focused on building foundational technology to solve the most pressing problems in power infrastructure at scale.

Join us in building the power foundation of the future!

Responsibilities

• Design isolated and non-isolated converter stages using advanced topologies such as multi-level converters, cascaded H-bridges, Dual Active Bridge (DAB) and ensuring robust protection and safety compliance for MV/LV systems
• Perform trade-off analysis and optimization of power conversion hardware to balance between loss, cost and size across Semiconductors, Magnetics and Cooling components
• Design magnetics to meet applicable safety, isolation, and thermal standards
• Design and verify high-voltage isolation strategies using magnetically and optically isolated signal and power paths across LV-MV domains
• Use FEA simulations to design magnetics and guide high-power high-frequency PCBA designs
• Work in close coordination with mechanical designers, manufacturing and test engineers to own the complete development cycle
• Own the design validation of the magnetics components to validate performance targets, isolation requirements

Qualifications

• M.S. or Ph.D. in Power Electronics, Electromagnetics or related field
• 4+ years' experience in magnetics design and in power conversion design
• Strong fundamentals in electromagnetics and material properties
• Experience working with SiC/GaN devices in high power density designs
• Good understanding of loss mechanisms in semiconductor devices and high-frequency magnetics
• Knowledge of Medium Voltage insulation coordination, hands-on experience with Hi-pot, Partial Discharge and Basic Impulse Test
• Knowledge of EMI/EMC test Standards and Electrical Safety (IEC, UL) Standards.
• Strong analytical skills for interpreting simulation and test data to guide design revisions.
• Excellent written and verbal communications in English
• Willingness and ability to travel up to 10% including internationally

Please note:

This role requires working on-site 5 days a week. We do not offer hybrid or remote options.

Salary: $175,000-$205,000/annual DOE and location

Pay Disclosure & Benefits

Compensation will be determined based on experience, location, and other factors permitted by law.

The benefits outlined below apply exclusively to employees located in the United States.

• Competitive Salary + Incentive Stock Options

• Medical, vision, and dental benefits for employees and their dependents, effective from the start of hire

• Company paid Basic Life, AD&D, short-term and long-term disability insurance

• 401k retirement savings plan through Empower

• Employees receive paid time off (PTO), paid sick days, and paid company holidays

• Commuter Benefits

• 100% paid maternal leave (12 weeks) and paternal leave (6 weeks)

Singapore-based employees receive benefits in accordance with local government provisions.

Equal Employment Opportunity

Amperesand is an equal opportunity employer and complies with all applicable federal, state, and local fair employment practices laws. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, ancestry, sex, sexual orientation, gender, gender expression, gender identity, genetic information or characteristics, physical or mental disability, marital/domestic partner status, age, military/veteran status, medical condition, or any other characteristic protected by law.

Amperesand is also committed to working with and providing reasonable accommodations to individuals with disabilities. Please let your recruiter know if you need an accommodation at any point during the interview process.