Senior Firmware Engineer, Wireless & Embedded - Remote

Lunar Energy, Inc.; United Kingdom; Hybrid; 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

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.