Systems Test Engineer

Lunar Energy is a home energy technology company that designs and sells integrated clean energy systems for residential customers. Its flagship product, the Lunar System, combines solar power generation, battery storage, and smart energy management into a compact, aesthetically designed unit that allows homeowners to produce, store, and use their own clean electricity. The company also offers the Lunar App and Lunar AI to help homeowners monitor and optimize their energy usage, as well as a Virtual Power Plant (VPP) program called Gridshare that enables customers to share stored energy with the broader grid. Lunar Energy's mission centers on making clean energy accessible, affordable, and simple for everyday homeowners, with the broader goal of accelerating the electrification of homes — including solar, EV charging, heating, and cooking. The company has partnered with Octopus Energy to offer innovative battery electricity plans, reflecting its commitment to rethinking how residential energy is produced and consumed. Lunar Energy has raised $232 million in financing to support its growth and expand its installer partner network across the United States. Founded by engineers with backgrounds at Tesla, Lunar Energy differentiates itself through a platform-first approach that goes beyond a standalone battery product, positioning its system as the foundation for whole-home electrification. The company serves both homeowners and a network of certified installer partners, and has received notable press coverage for its role in redefining home energy with smarter, cleaner power solutions.

System Integration and Test Lead Engineer

This role is on the front line of system integration between mechanical parts, electrical boards, low-level embedded firmware, and higher-level application logic.  This is a highly technical role requiring experience with integrated hardware and embedded software.  You will identify and solve cross-functional integration problems, and put in place hardware and software to perform automated system-level regression testing.

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.

On a given day at Lunar, you’ll likely…

• Participate in designing new features, develop test cases.
• Put together new hardware and firmware for the first time, instrument setups and perform manual tests and capture results.
• Solve integration problems and create automated system-level regression tests.
• Review firmware code and highlight limitations and add test cases and propose fixes.
• Work side by side with your counterparts in EE, ME, FW, and Systems to release high-quality features with extensive regression testing.
• Ensure the system meets its requirements and this behavior is robust across all corner cases
• Work with team in root causing issues and perform tests to exercise limits
• Define and implement hardware in the loop testing
• Evaluate new tools and equipments to ease and improve testing.

Desired Skills:

• Windows, Mac and Linux platform experience
• Strong skills in Python related to scripts, control of devices etc.
• Good understanding of C programming language in the interests of understanding device functionality.
• At least a minimum understanding of CI/CD pipeline and data analysis tools (Jenkins, AWS, Grafana)
• Ability to make things work, and a drive to break them
• Demonstrated excellence in debugging complicated system-level behavior at the crossroads of electrical engineering and firmware
• Outstanding written and verbal communication and the ability to smoothly work cross-functionally
• A strong sense of ownership and responsibility towards delivering a great product.
• Fluent in scripting/automation using Python
• Experience with hardware in the loop testing
• Able to read electrical schematics and device/component datasheets.
• Experience with BMS, batteries, and power electronics desired
• Experience with CAN, Wifi, Ethernet communications desired
• BS in CS, EE, or equivalent

Benefits:

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
• Flexible Paid Time Off plus 10 paid holidays
• 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 $120,000-$170,000 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.