Power Electronics Engineer

Lunar Energy; San Francisco (CA); On-site; USD 125,000 - 165,000; Full time

Benefits offered by this job

Equity in Lunar Energy

Employee stock program

Medical, dental, and vision insurance

Tax-deferred 401(k)

Job summary

Lunar Energy in San Francisco, CA is seeking an experienced Senior Power Electronics Engineer to lead the design of high‑efficiency, high‑density power converters from concept through production.

You will own the power conversion system end‑to‑end, collaborate with mechanical, thermal, and firmware teams, and mentor junior engineers. A B.S. in EE with 5+ years in power electronics is required; MS/PhD preferred.

Qualifications

• Minimum B.S. in Electrical Engineering with 5 years’ experience in power electronics.
• MS/PhD preferred in power electronics.
• Knowledge of active and passive losses in power conversion.

Responsibilities

• Design power conversion systems from 10W–10kW, DC/DC converters, and inverters.
• Bring up and test systems to validate function and performance.
• Collaborate with mechanical, thermal, and firmware teams to optimize the product.
• Own the power conversion system end‑to‑end from spec to production.

Skills

Power electronics

High voltage systems

Lab skills

Education

B.S. in Electrical Engineering

M.S./Ph.D. in power electronics

Tools

Oscilloscopes

Impedance analyzers

Power supplies

Job description

Lunar Energy was founded to transition homes to 100% clean energy—making our electricity greener, our air cleaner and our energy more safe, secure and reliable for all. We’re a fast-growing, global company building the world’s best clean energy products to electrify all homes and connect communities to form clean, resilient virtual power plants.

Responsibilities

• Create the best possible products by contributing to product level features, design, and vision by leveraging your experience and creativity
• Detailed design of power electronic systems from 10W – 10kW, DC/DC converters, offline isolated power supplies, and inverters including the selection of topology, semiconductors, magnetics design, schematic design and layout, EMC and design of various safety aspects
• Collaborate to create efficient verification and validation test plans for the individual components as well as the complete system
• Bring up and testing of systems to validate functionality, optimize performance, and evaluate critical characteristics
• Work across functions such as mechanical, thermal, reliability, and firmware engineering to optimize the product
• Start-to-finish ownership of the power conversion system from specification through design, prototype, validation and manufacturing
• Minimum B.S. in Electrical Engineering with 5 years’ experience in power electronics design. M.S. or Ph.D. degree with power electronics focus is preferred. Job grade can be discussed based on qualification and experience
• Detailed understanding of active and passive component losses in power conversion and the various means to reduce/mitigate those losses
• Experience of designing high efficiency and high density power converters with wide bandgap devices
• Familiarity with various topologies (two-level, multilevel, soft switching, etc.) and ability to analyze, select, and design topologies best suited for a given application
• Knowledge of sensor design to measure converter parameters in real time in a noisy environment
• Familiarity with magnetics design and specification, applications of various core materials for both power and filtering, knowledge of winding structure and optimization, and insulation strategies
• EMC design and optimization. Understanding of EMC theory applied to both PCB layout as well as filter designs
• Ability to design schematics and conduct layout design or review as it applies to power conversion
• Strong lab skills with working knowledge of the tools and techniques for power conversion test and analysis (e.g., use of oscilloscopes, impedance analyzers, sources, and loads in an environment with both high voltages and currents, and high common-mode and differential-mode noise)

Helpful Skills

• Working with high voltage, current, and power
• Ability to simulate power converter based electrical systems and familiarity with the tools thereof
• Familiarity with global safety and EMC certifications and building systems to pass the relevant codes
• Previous work in the solar, energy storage, or EV/ EV Charging industries
• Familiarity with embedded control and application and programming of microcontrollers
• Understanding of mechanical and thermal considerations

We’re dedicated to creating a remarkable employee experience. At Lunar, competitive base pay is one part of our total compensation package. Lunar employees also have the opportunity to become Lunar shareholders by getting equity in a fast-growing company and participating in our employee stock program.

Additional benefits include:

• Medical, dental, and vision insurance for employees and dependents
• Tax deferred 401(k) plan
• Paid parental leave for all full time employees including 12 weeks paid parental leave for the birthing mother and 6 weeks paid parental leave for the non-birthing parent
• Subsidized EV charging and pre-tax commuter benefits

Our DE&I Philosophy: Lunar Energy is an equal opportunity employer. We are committed to attracting, developing and retaining diverse talent by supporting an inclusive workplace. Lunar recruits, hires, trains, promotes, compensates, and administers all personnel actions without regard to race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability status or any other status protected by applicable law.

Our Compensation Philosophy: Our goal is to ensure that all Lunar Energy employees are fairly compensated. Please note that the salary range information that follows is a good faith estimate for this position provided pursuant to the Pay Transparency for Pay Equity Act for California applicants. The salary range estimate for this position depending on level of experience is: $125,000 - $165,000 USD.

The actual offer, reflecting the total compensation package & benefits, will be at the company’s sole discretion, and determined by factors including but not limited to years of experience, job level, geographic location, and other relevant business considerations. The company also reserves the right to amend or modify this job description, employee perks, and benefits at any time.