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. Our team consists of passionate technology and industry experts united by the mission to electrify homes through our integrated software platform, Gridshare. 

We are seeking a Senior Firmware Engineer to join our ambitious, focused and collaborative team. In this role, you will be instrumental in building the features that drive Lunar’s success and help realize our vision of transforming home energy.

Responsibilities:

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

Your required skills:

• 5+ years’ of experience developing and architecting software, with experience of the full lifecycle from prototype to production.
• Proficiency in C for bare metal systems and/or RTOS.
• Experience implementing power electronics firmware control functionality.
• Strong ability to integrate hardware and software to develop end-to-end solutions.
• Comfortable working in a fast-paced small team, where your initiative and contributions have a significant impact. 
• Experience of contributing to a multi-disciplinary team following modern software engineering practices (e.g. Git, Continuous Integration).

Nice 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 Rust or Python.

Who You Are: 

• You thrive in small, dynamic teams and are excited by the opportunity to make a big impact.
• You’re open to traveling to our London office once every week and our HQ in California once every quarter

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 

Location: This role offers the flexibility to work remotely 80% of the time, with weekly visits to our London office. You’ll also travel to our HQ office in California, USA quarterly. We are also open to candidates interested in eventual relocation 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.