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Mechanical Engineer (Contractor)

Join Lunar Energy in Mountain View, California as a Mechanical Engineer contractor. Lead mechanical system design for innovative home energy products, collaborating with a dedicated team. Benefit from a fast-growing clean energy company focused on sustainable solutions and global impact.

On-site Contract position UTC-07:00 Updated 4 days ago
Salary
US$45–80 /hour

Applies on job-boards.greenhouse.io

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As a ATE Mechanical Engineer at Lunar, you will be responsible for the full product development lifecycle of mechanical systems within our revolutionary home energy products. We are looking for people who are passionate about a more sustainable future and want to make that vision a reality. An ideal candidate is excited and ready to collaborate closely with a small, dedicated team. Engineers at Lunar are hands-on and involved in a wide range of facets of the product, from applying fundamental physical principles in design to working with high-volume production suppliers.

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...

  • Work back and forth with collaborators across the company to continuously refine and improve our understanding of how our products can create the greatest impact, get to market quickly, and operate reliably for our customers
  • Brainstorm and evaluate new solutions, weigh pros and cons, and narrow down options
  • Efficiently test ideas and designs: anything from back-of-the-envelope calculations to physical tests and multi-physics simulations
  • Design high-performance, reliable, easy-to-manufacture parts and assemblies, employing a variety of high-volume manufacturing processes
  • Create and review drawings and other part specifications
  • Manage bills of materials, cost and mass roll-ups, vendors and engineering releases
  • Define manufacturing processes and inspection methods
  • Collaborate directly with part manufacturers to support prototypes and production

Desired Skills/Experience

  • Mechanical Design

  • Extensive experience in 3D Modeling software (e.g. Onshape, NX, Solidworks)

  • Knowledge of how to make a PCBA Bed of Nails fixture.

  • Detailed knowledge of 2D Drawing creation and GD&T

  • Ability to analyze designs using Tolerance Analysis/Stackup, Statics/Load Path Analysis, Finite Element Analysis, Root Cause Analysis and Design Failure Modes and Effect Analysis

  • Familiarity with electronic test equipment and basic electromechanical troubleshooting

  • Experience with test fixtures, jigs, and various mechanical components for high cycle count.

  • Experience with fine pitch assemblies and construction.

  • Should be able to conduct strain gauge measurements and understand stress on PCBAs and incorporate proper design to avoid it.

  • Experience with PCBA management such as Mechanical Control Outline generation

  • Working knowledge of pneumatic cylinders and control methods

  • Working knowledge of Thermal Management techniques

  • Prototyping skills using 3D printing, machining, sheet metal bending, laser cutting, milling and general machine shop tools

  • Manage suppliers for all the parts which are required for our station construction.

  • Manufacturing Support

  • Experience communicating with component suppliers including Design for Manufacturing report review, First Article Inspection, and Part Production Approval Process

  • Ability to generate Work Instructions for electromechanical assemblies

  • Knowledge of Process Failure Modes and Effects Analysis

  • Create preventive maintenance documentation.

  • Extensive experience with Onsite Build Support at domestic and international contract manufacturing sites . Approximate 10-20% travel as and when required.

  • Communication

  • Ability to generate detailed design documentation

  • Drive a project from start to deployment involving other cross functional teams, vendors, technicians etc.

  • Ability to collaborate with other engineers (electrical engineers, automated test engineers, etc..)

  • Skilled at clear verbal and written communication including concise slide deck creation

  • Ability to give kind and direct feedback and receive feedback with an open mind

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 hourly 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 hourly range estimate for this position depending on level of experience is $45-$80 USD

The actual offer, reflecting the total compensation package 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.

Pay & benefits

US$45–80 /hr

About this role

Posted
30 Sep 2026
Updated
30 Sep 2026
Job type
Contract position
Workplace
On-site
Sectors
Working hours
UTC-07:00
Experience
Extensive experience required

About Lunar Energy

Company Overview

Name

Lunar Energy

Headquarters

Mountain View, CA, United States

Founded

2020

Size

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).

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