Firmware Engineer Staff to Principal
Enphase Energy is a global energy technology company and a leading provider of solar, battery, and electric vehicle charging products. Founded in 2006, our innovative micro‑inverter technology revolutionized solar power, making it a safer, more reliable, and scalable energy source. Today, the Enphase Energy System enables users to make, use, save, and sell their own power. Enphase is also one of the most successful and innovative clean‑energy companies in the world, with more than 80 million products shipped across 160 countries. Join our dynamic teams designing and developing next‑gen energy technologies and help drive a sustainable future!
About the role
This role sits within the CTO team on the Solid‑State Transformer (SST) platform team. We design and deliver the embedded firmware for Enphase's next‑gen grid‑scale energy conversion systems. We are hiring at Staff, Senior Staff, and Principal levels. Every engineer writes code, debugs hardware, and owns outcomes; higher levels carry increasing architecture ownership and technical leadership.
Responsibilities
- Design and ship firmware for real‑time embedded systems in C/C++.
- Develop board‑ and system‑level firmware across multi‑processor/core platforms (bare‑metal, Zephyr RTOS).
- Integrate real‑time control loops with application and control processors.
- Co‑define HW/SW boundaries and drive system bring‑up with hardware and power‑electronics teams.
- Drive end‑to‑end validation – unit tests, HIL, and prototype testing.
- Collaborate cross‑functionally through DVT, factory test, and field quality.
- At senior levels: own platform architecture, lead reviews, mentor engineers, and drive hiring.
Qualifications
- BS with 8+ years, MS with 6+ years, or PhD with 3+ years of design experience for a Staff Engineer role.
- BS with 12+ years, MS with 8+ years, or PhD with 5+ years of design experience for a Sr. Staff Engineer role.
- Expert‑level proficiency in C and modern C++ for real‑time embedded applications.
- Experience with bare‑metal and Zephyr RTOS firmware development.
- Functional safety firmware development experience.
- Strong knowledge of ARM Cortex‑M/R microcontroller architectures and peripherals (ADC, PWM, UART, I2C, SPI, CAN).
- Ability to work from low‑level driver development through application development.
- Hardware bring‑up, schematic reading, and driver development skills.
- Closed‑loop control algorithm implementation on embedded targets.
- System testing and debug using oscilloscopes, protocol analyzers, and HIL setups.
- Python scripting for test automation and tooling.
- Track record of shipping products from concept through manufacturing and field support.
Desired Skills
- Familiarity with development tools such as Docker, GCC, GDB, VS Code, GNU Make, CMake.
- Experience with CI/CD pipelines and containerized build environments (Docker, Bitbucket Pipelines, GitHub Actions).
- Embedded Linux (Yocto, BSP, device tree) and ARM Cortex‑A processors.
- Bootloader design, secure boot, and OTA update mechanisms.
- Industrial communication interfaces and protocols: RS‑485, CAN FD, UWB, Ethernet, Modbus RTU/TCP.
- Power conversion, energy storage, grid‑connected equipment, or BMS experience.
- Knowledge of UL/IEC standards for power electronics products (UL1998, IEC60730, IEC61850, Zephyr RTOS).
Location
Austin, TX
Compensation
The base pay range for this position is $110,000 to $183,000 per year. This salary range may be modified in the future. The successful candidate’s starting pay will be determined based on job‑related skills, experience, education or training, work location, and market conditions. This position is also eligible for bonus, equity, and benefits.