Systems Test Engineer
Lunar Energy
Company Overview
Lunar Energy
Mountain View, CA, United States
2020
Approximately 250 employees (source: lunarenergy.com).
What They Do
Lunar Energy is a pioneering renewable energy startup focused on electrifying homes through innovative clean energy products and virtual power plants. The company, founded by Kunal Girotra, a former Tesla Energy executive, aims to provide scalable solutions that allow homeowners to generate, store, and manage electricity efficiently. Their flagship product is a next-generation home battery system, which is part of a modular hardware ecosystem designed to facilitate the transition to 100% clean energy by replacing fossil fuel appliances with solar-compatible technologies such as heat pumps and induction cooking (source: cbinsights.com). Additionally, Lunar Energy integrates its hardware with Gridshare software, acquired from Moixa, to enable smart energy controls and aggregation into virtual power plants (VPPs) that connect thousands of home batteries for grid balancing (source: cleantechnica.com).
Projects & Track Record
While specific completed projects are limited as Lunar Energy focuses on product development, the company has made significant strides in integrating proven technologies from its acquisition of Moixa, which has managed extensive home battery fleets for smart charging and VPPs (source: investors.sunrun.com). The first home battery system was slated for market launch in late 2022, and ongoing efforts are centered on scaling manufacturing and partnerships with Sunrun for nationwide residential rollouts. Lunar Energy's geographical operations include its headquarters in Mountain View, California, and a software hub in London, UK, targeting U.S. residential customers first while eyeing global VPP expansion (source: cbinsights.com). Key clients include Sunrun, which serves as a lead investor and distribution partner, further solidifying Lunar's position in the renewable energy market.
Recent Developments
In the past two years, Lunar Energy has not disclosed any new funding rounds or major contracts following its emergence from stealth in 2022. The company continues to focus on product scaling and commercialization of its VPP solutions, with the 2022 $300 million funding raise and the acquisition of Moixa marking significant milestones in its early development (source: equityzen.com). Although press mentions in 2025 have referenced unrelated entities, Lunar Energy remains committed to its mission of home electrification and expanding its market presence through strategic partnerships and technological advancements (source: investors.sunrun.com).
Working There
Lunar Energy offers a dynamic work environment primarily focused on engineering roles, with approximately 250 employees engaged in hardware, firmware, software, product development, and R&D. The company actively recruits talent for its Mountain View headquarters and London office, emphasizing a mission-driven culture that attracts savvy entrepreneurs and passionate experts (source: lunarenergy.com). While specific benefits are not publicly documented, the company invites applications for various roles, highlighting its commitment to building a high-impact team dedicated to addressing climate challenges through home electrification (source: lunarenergy.com).
Last updated on Feb 23, 2026 | Report an issue
Job Description
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.
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Job expired?Please let Lunar Energy know you found this job on Rejobs. This will help us grow and get more people to work on renewable energy!
Apply now
Job expired?Please let Lunar Energy know you found this job on Rejobs. This will help us grow and get more people to work on renewable energy!
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About the role
May 15, 2026
Full time
Company
- Mountain View, California, United States
Minimum BS in CS, EE, or equivalent with relevant experience
UTC-07:00