Senior Firmware Engineer - Wireless IoT, Equity Eligible

Lunar Energy; Mountain View (CA); On-site; USD 120,000 - 175,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Flexible PTO + 10 holidays

401(k) plan

Parental leave

EV charging subsidy

Equity / stock options

Job summary

Lunar Energy is seeking a Sr Firmware Engineer to own firmware from concept to high-volume production for our home energy products. You’ll collaborate with cross‑functional teams to deliver reliable, feature-rich firmware and optimize power electronics controls and system diagnostics.

Ideal candidates have 5+ years delivering firmware, hands-on experience with ESP-IDF, WiFi/BLE and protocols, and a strong C background. California location with competitive compensation.

Qualifications

• Bachelor's degree in a computer-engineering related field or equivalent experience.
• 5+ years delivering firmware for new products as part of a team.
• Experience with CAN, Protocol Buffers and related protocols.
• Espressif ESP-IDF product development experience.
• Embedded Ethernet stacks, TCP/IP and HTTPS knowledge.
• Wireless tech: WiFi, WiFi Mesh, Bluetooth/BLE, BLE‑Mesh.
• Proficient in C; familiar with cmake and Python.
• Experience with lab equipment like oscilloscopes and logic analyzers.

Responsibilities

• Collaborate across disciplines to refine product impact and reliability.
• Design firmware powering home energy product components and features.
• Test ideas with simulations and validation tests before release.
• Support manufacturing with automation features and partner testing.

Skills

C language

Embedded systems

Espressif ESP-IDF

WiFi / BLE / BLE-Mesh

CAN Protocol

Protocol Buffers

Python

TCP/IP

Oscilloscopes

Logic Analyzers

Education

Bachelor's degree in a computer-engineering related field

Tools

cmake

TCP/IP

Ethernet stacks

Job description

Lunar Energy is seeking a Sr Firmware Engineer to own firmware from concept to high-volume production for our home energy products. You’ll collaborate with cross‑functional teams to deliver reliable, feature-rich firmware and optimize power electronics controls and system diagnostics.

Ideal candidates have 5+ years delivering firmware, hands-on experience with ESP-IDF, WiFi/BLE and protocols, and a strong C background. California location with competitive compensation.