Lunar Energy
Senior Firmware Engineer - Communications
$120K–$175K
Mountain View, CA +1 · Senior · Full-time · Posted Sep 3, 2026
- Location
- Mountain View, CA
San Francisco, California, United States - Experience
- 5+ years experience delivering firmware for new products as part of a team.
- Education
- Degree in a computer-engineering related or adjacent field, or demonstrated commensurate ability.
About the job
Designs and delivers firmware for Lunar Energy’s home energy products, with a focus on communications, reliability, and product development from concept through production.
What you'll do
- Develop firmware for product functions including communications protocols, system behaviors, diagnostics, updates, and control algorithms.
- Collaborate across disciplines to evaluate features, test designs, and improve product reliability and time to market.
- Support manufacturing by building automation functionality into components and supporting features with manufacturing partners.
What they ask for
- 5+ years experience delivering firmware for new products as part of a team.
- Experience with communication protocols, including CAN and Protocol Buffers.
- Proficiency in C.
- Experience with Espressif ESP-IDF product development.
Nice to have
- Development experience with a wireless mesh network framework like esp-wifi-mesh and experience releasing high-volume products requiring 24/7 communications reliability.
- Experience with embedded Ethernet stacks, TCP/IP, BSD Socket API, HTTPS, WiFi/WiFi Mesh, Bluetooth/BLE, or BLE-Mesh.
Pay
$120,000 - $175,000 USD (base salary)
Tools
CAN, Protocol Buffers, Espressif ESP-IDF, TCP/IP, BSD Socket API, HTTPS, WiFi Mesh, Bluetooth/BLE
Model-written summary · the original posting is authoritative