Lunar Energy

Senior Software Engineer

Join Lunar Energy in London as a Senior Software Engineer working remotely. Develop APIs and frontend apps for next-gen home battery systems. Enjoy competitive salary, stock options, private medical insurance, and flexible remote work.
Lunar Energy
Lunar Energy
London, United Kingdom Remote Full time UTC+00:00

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

At Lunar Energy, we're on a mission to transform the way we power our homes by building an ecosystem of all-electric products, starting with a next-generation home battery system and a cloud PaaS to manage large fleets of Distributed Energy Resources (DER) assets. Comprising a team of visionary entrepreneurs and dedicated technology and industry experts, we're united by our shared vision of deploying and building products to electrify homes that are connected through an integrated software platform.

We're looking for a Senior Software Engineer to join our talented team of Software Engineers in the UK.

Your Responsibilities

  • Designing and implementing the business logic to expose our functionality via APIs and UI interfaces, using functional programming and serverless computing
  • Implementing Frontend code on mobile or web applications
  • Working and co-ordinating across multiple teams to ensure delivery, raise standards and ensure consistency
  • Contributing to the continual improvement of our development best practices

Your key skills & experience

  • 4+ years of experience as a Software Engineer
  • Experience in strongly typed languages, such as Typescript, Rust or others
  • Experience in both Frontend and Backend software systems
  • Working experience with Unix operating systems
  • You enjoy working in a smaller team where you can see the huge impact of your work
  • You value learning and approach new information with an open mind, willing to reconsider your opinions when presented with compelling evidence
  • You are autonomous and enjoy managing your own workload and deadlines

Desirable skills

  • Experience with the Functional programming paradigm
  • Experience in UI/UX design, and tools such as Figma
  • Knowledge of Functional Reactive Programming and related frameworks such as React or RXJS
  • Professional experience in the renewable energy sector, or an interest in green tech
  • Japanese language proficiency

Joining us gives you

  • A competitive salary and stock options package
  • Access to a private Medical Insurance scheme through BUPA (medical history disregarded)
  • A wellbeing and lifestyle benefits plan through Medicash
  • 5% employer contributions pension matching
  • Life assurance & income protection schemes (available after 12 months of service)
  • A budget of ??1,000 per financial year for work-related training and an allowance of 4 training days.
  • Cycle To Work scheme and Workplace Nursery benefit.
  • A ??200 bonus upon joining for remote work setup.
  • Access to Spill - a Mental Health Support platform.
  • Enhanced Maternity and Paternity Pay
  • 25 days of annual holiday entitlement plus 8 Bank Holidays.
  • Fully remote working within the UK

Duration: Full-Time

Location: Fully remote, but you are welcome any time at our office in Spitalfields, London (UK), as often as you like.

We are proud to be an equal opportunities employer and welcome applications from all suitably qualified persons regardless of race, sex, ethnicity, disability, religion/belief, sexual orientation, gender identity or expression, nationality, age or social background. We would like to actively encourage applications from those who identify with less represented and minority groups. We do not filter applications by university background and encourage those who have taken alternative educational and career paths to apply

Apply now

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About the role

May 14, 2026

Full time

Company

May 14, 2026

Remote

Energy Storage

Lunar Energy

lunarenergy.com

  •  London, United Kingdom

4+ years

UTC+00:00