Staff Firmware Engineer

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 microinverter 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

The System Controls Innovation team, part of the Office of the CTO, prototypes and delivers next-generation system-level product solutions for Enphase products. The team is a fast-moving group of firmware and software engineers focused on end-to-end system integration, validation, and product innovation — working closely with multi-disciplinary teams across the organization.

As a member of the System Controls Innovation team, you will solve some of the most exciting problems in the distributed energy space — designing and validating the firmware that drives our next-gen products from prototype through production.

We are seeking a Staff Firmware Engineer to develop, integrate, and validate system-level firmware for next-gen products and improve current designs through hands-on prototyping and end-to-end system testing.

What You Will Do

• Design, implement, and ship firmware features, primarily in Modern C++, for real-time embedded systems
• Develop and integrate system-level firmware across complex embedded platforms with multiple processors/controllers
• Drive end-to-end system testing and validation — from unit tests and software simulations through hardware-in-the-loop (HIL) and prototype testing
• Optimize firmware solutions through co-design with hardware teams, ensuring system-level performance and reliability
• Collaborate with cross-functional teams to integrate, test, and troubleshoot prototype and production designs
• Mentor junior engineers and contribute to engineering best practices

Who You Are and What You Bring

• BS/MS/PhD in Computer Science, Computer Engineering, Electrical Engineering, or a closely related discipline
• BS and 8+ years / MS and 6+ years / PhD and 3+ years' experience in a similar (non-academic) role as an embedded software or firmware engineer
• Expert-level C++ and software fundamentals, including algorithm development, objected oriented design, code modularity, maintainability, and data structures proficiency
• Significant experience with real-time operating systems and multithreaded firmware development
• Expertise in both bare-metal and Zephyr RTOS environments
• Familiarity with ARM Cortex-M0/M4/M7 controllers and multi-core architecture
• Proven ability to troubleshoot firmware-related issues within complex, multi-controller systems and drive solutions
• Experience with end-to-end system testing — including unit tests, HIL testing, and validation with external test equipment such as oscilloscopes, protocol analyzers, etc.
• Knowledge of microcontroller peripherals such as ADC, GPIO, PWM, UART, I2C, and SPI
• Familiarity with development tools such as Docker, GCC, GDB, VS Code, GNU Make, CMake, etc.
• Experience with Git version control
• Ability to take ownership of development tasks and drive them to completion with high quality to support team success

Additional Desired Skills

• Experience with system-level integration and validation across firmware, hardware, and software boundaries
• Experience adopting AI-assisted development tools and workflows, including LLM-integrated coding environments
• Experience with industrial communications protocols such as Controller Area Network (CAN/CANFD), Ethernet, Modbus TCP/RTU, MQTT, IEC61850, etc.
• Familiarity with CAN sniffers, AC grid simulators and programmable loads
• Familiarity with ARM Cortex-A53/A55 processors Embedded Yocto/Linux development
• Familiarity with Python and scripting languages for test automation and data analysis
• Experience with CI/CD pipelines and containerized build environments using tools such as Docker, Bitbucket Pipelines, or GitHub Actions

Travel

• Occasional travel domestically

Work location

• Austin, TX

Candidates must be authorized to work in the US.

The base pay range for this position is $110,000 to $151,000. 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.

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