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🟢 Actively Hiring · Posted 24d ago ⏳ Closes in 67 days UK Corridor 🛡️ UK Work Eligibility 🏢 Company - Private

Senior Firmware Engineer

Salary Range
£70,000 - £95,000
£5,833 - £7,917 / mo

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This vacancy has been independently reviewed by the OppaJob Transatlantic Career Intelligence Desk to confirm authentic direct employer recruiting, verify compensation transparency, and eliminate applicant processing fees.

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Corporate Registration Verified UK Companies House registration standing active
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Prevailing Wage Benchmark UK National Minimum Wage & Equality Act 2010 aligned
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Zero-Intermediary Direct Pipeline Direct candidate ATS submission. 100% free with zero recruitment charges.
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Corridor Right-to-Work Match UK Work Eligibility

Transatlantic Cost of Living & Purchasing Power Benchmark

Verified Analytics
Location Base
London, England
Tier-1 UK Economic Zone
Est. Take-Home Pay
68% - 74% (After PAYE & NI)
Single tax filer baseline
Transatlantic Parity
1.0 GBP ≈ $1.28 USD Living Standard
Direct corporate benchmark
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Position Overview & Specifications

Lunar is transforming the way we power our homes by building an ecosystem of all-electric products starting with a next-generation home battery system. The Lunar team is made up of savvy entrepreneurs as well as passionate technology and industry experts who build and deploy products to electrify homes, which are connected through an integrated software platform called, Gridshare

We are looking for a Senior Firmware Engineer to join our ambitious, focused and collaborative team of talented developers to build the features the company needs to succeed in its vision.

Responsibilities:-

These include any subset of:-

  • Developing the firmware for our hardware devices including optimisation on the edge.
  • Designing, coding and testing sub-systems that provide high performance functionality on constrained hardware.
  • Writing code across the full embedded stack from bootloader to high-level application software, including on embedded Linux operating systems.

Your required skills:

  • 5+ years' experience developing and architecting software, with experience of the full lifecycle from prototype to production.
  • Experience developing C in bare metal systems and/or RTOS.
  • Experience implementing power electronics firmware control functionality.
  • Ability to integrate hardware and software to develop end to end solutions.
  • Happy working in a small, fast moving team, in which your individual initiative and contributions can have a big impact.
  • Contribute in a multi-disciplinary team following modern software engineering practices (e.g. Git, Continuous Integration).

Good to have:

  • Familiarity with automated testing tools and debugging methodologies.
  • Experience with battery management systems and AC/DC converters.
  • Ability to read hardware schematics and PCBs.
  • Experience in any of: Rust / Python.

You should be:

  • Happy working in a small, fast-moving team, in which your initiative and contributions can have a big impact
  • Willing to travel to and work from the HQ office in California a few times a year

Joining us gives you:

  • Competitive salary from £70,000 to £95,000 per Annum and stock options package
  • Private Medical Insurance scheme through BUPA (medical history disregarded);
  • A wellbeing and lifestyle benefits plan through Medicash
  • 5% employer contributions pension matching
  • A budget for work related training of £1,000 per financial year and an allowance of 4 training days
  • Cycle To Work scheme and Workplace Nursery benefit
  • £200 upon joining for remote work set-up
  • Access to Spill - Mental Health Support platform
  • Enhanced Maternity + Paternity Pay
  • 25 days annual holiday entitlement + 8 Bank Holidays
  • Flexible start and finish times, fully remote working or hybrid depending on preferences

Location: This role can be fully remote inside the UK. Our offices in Liverpool Street (London) and Manchester will remain available for any employees who wish to use them on a part-time or full-time basis.We would also consider candidates interested in relocating to California, USA.

We are proud to be an equal opportunities employer and welcome applications from all suitably qualified persons regardless of their 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.

Candidate Selection & Onboarding Process

1

Application & Resume Screening

Submit your tailored CV/Resume directly to the talent acquisition portal.

2

Technical & Competency Interviews

Virtual interviews with the hiring manager and multidisciplinary team.

3

Formal Offer & Benefits Negotiation

Written agreement outlining compensation, equity, retirement vesting, and relocation allowances.

4

Onboarding & Corporate Integration

Equipment provisioning, team orientation, and commencement of duties.

United Kingdom Right to Work & Skilled Worker Visa Guide

Corridor Intelligence

Employment in the United Kingdom requires legal Right to Work verified under the Home Office Points-Based Immigration System:

🇬🇧 Skilled Worker Visa (Tier 2)

Sponsoring employers must hold an active Home Office A-rated Sponsor License and assign a valid Certificate of Sponsorship (CoS). Role must meet the general minimum salary threshold (£38,700) or occupation going rate.

🏛️ Settlement (ILR) Pathway

Continuous employment under Skilled Worker status establishes eligibility for Indefinite Leave to Remain (ILR) after 5 continuous years, leading to British Citizenship.

⚖️ Official regulatory reference: UK Visas and Immigration (UKVI) & Home Office Sponsor Register.

Candidate Preparation Blueprint: Energy & Utilities

Recruitment Insights

Based on transatlantic hiring benchmarks for Senior Firmware Engineer roles across Lunar Energy's corporate sector, successful applicants typically excel across three core dimensions:

1. Domain Competency

Demonstrated portfolio evidence, architecture/system design case studies, or validated professional certifications directly applicable to Energy & Utilities.

2. Behavioral & Leadership

STAR method competency responses highlighting cross-functional leadership, conflict resolution, and delivering measurable enterprise ROI under tight timelines.

3. Compensation Alignment

Total compensation expectation aligned within the benchmarked £70,000 - £95,000 bracket, including retirement vesting and health parity.

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Hiring Organization
Lunar Energy

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Location: London, England
Eligibility: UK Work Eligibility
Schedule: Company - Private
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