Staff Firmware Engineer New UK

Lunar Energy, Inc.; United Kingdom; On-site; GBP 60,000 - 90,000; Full time

Benefits offered by this job

Competitive salary and stock options

Private Medical Insurance through BUPA

Medicash wellbeing plan

5% pension matching

£1,000 training budget + 4 training**

Cycle To Work

Remote or hybrid work options

Mental health support via Spill

Enhanced maternity/paternity pay

25 days annual leave + 8 holidays

Equity/stock program

Job summary

Lunar Energy is looking for Embedded/Firmware Engineers to lead the full product development lifecycle of firmware and software across our home energy products. You will collaborate with a cross‑functional team to shape concepts from first principles through to production‑ready designs.

The role emphasizes hands‑on development, architecture discussions, and involvement in all stages of product delivery to ensure reliability and performance for customers.

Qualifications

• Degree in a computer-engineering related or adjacent field, or demonstrated commensurate ability.
• 5+ years experience delivering firmware for new products as part of a team.
• Proficiency in C, and working familiarity with Python. Rust knowledge is nice to have.
• Experience working with IP stack protocols: Ethernet, WiFi, TCP, UDP, HTTPS, etc
• Working knowledge of Bluetooth/BLE.
• Experience working with WiFi networks and Espressif ecosystem
• Working knowledge of Oscilloscopes, Logic Analyzers and other lab test equipment

Responsibilities

• Develop wireless network communication solutions for high-volume products, ensuring continuous 24/7 reliability
• Design firmware software that runs in our home energy product components: RF communication protocols, mobile app interfaces, system diagnostics and updates.
• Drive design discussions on system architecture to achieve the desired product functionality.
• Collaborate with the team on design and development, including participating in code reviews.
• Work collaboratively with other disciplines 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

Skills

C programming

Python familiarity

Rust knowledge

IP stack protocols

Bluetooth/BLE

Espressif ecosystem

Oscilloscopes/Logic Analyzers

Education

Degree in computer-engineering or related field

Tools

Oscilloscopes

Logic Analyzers

Lab test equipment

WiFi networks

Job description

Embedded/Firmware Engineers at Lunar will be responsible for the full product development lifecycle of our products’ firmware and software, which are important sources of functionality, adaptability, and optimization of our designs. 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 dedicated, cross‑functional team to deliver innovative, best‑in‑class products. Engineers at Lunar are hands‑on and involved in all aspects of the product, and own the design from forming concepts based on first principles to managing high‑volume production quality.

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…

• Develop wireless network communication solutions for high-volume products, ensuring continuous 24/7 reliability
• Design firmware software that runs in our home energy product components: RF communication protocols, mobile app interfaces, system diagnostics and updates.
• Drive design discussions on system architecture to achieve the desired product functionality.
• Collaborate with the team on design and development, including participating in code reviews.
• Work collaboratively with other disciplines 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

Desired Skills:

• Degree in a computer‑engineering related or adjacent field, or demonstrated commensurate ability.
• 5+ years experience delivering firmware for new products as part of a team.
• Proficiency in C, and working familiarity with Python. Rust knowledge is nice to have.
• Experience working with IP stack protocols: Ethernet, WiFi, TCP, UDP, HTTPS, etc
• Working knowledge of Bluetooth/BLE.
• Experience working with WiFi networks and Espressif ecosystem
• Working knowledge of Oscilloscopes, Logic Analyzers and other lab test equipment

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:

• Competitive salary 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
• 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

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.