Staff Embedded Firmware — EMS and Industrial Ethernet

Enphase Energy, Inc.; Bengaluru; On-site; INR 2,500,000 - 5,500,000; Full time

Job summary

Enphase Energy in Bengaluru seeks a Staff Firmware Engineer (Contract) to join Core Engineering R&D, focusing on residential and commercial energy storage products. You will design and implement firmware for STM32 and ARM Cortex-M MCUs, develop low-level drivers, and contribute to secure bootloaders and firmware upgrades.

You will work with cross-functional teams, use Zephyr RTOS, Python tooling, and CI/CD pipelines with Git and Docker, ensuring robust validation, testing, and integration across

Qualifications

• Degree in Engineering (BE/BTech) in EE/CE/CS or equivalent.
• 8+ years of non-academic embedded software/firmware experience.
• Strong expertise in embedded firmware for microcontroller-based systems.

Responsibilities

• Design and develop firmware for STM32/ARM Cortex-M microcontrollers.
• Develop drivers for I2C/UART/SPI and CAN communication interfaces.
• Implement secure bootloaders and firmware upgrade mechanisms.
• Contribute to CI/CD pipelines with Git and Docker-based build systems.
• Perform unit and integration tests in Zephyr ecosystem.

Skills

Embedded firmware development

TCP/IP protocols (MQTT, Modbus)

Industrial Ethernet

TLS / cybersecurity concepts

Cross-functional collaboration

Education

B.E./B.Tech in Electrical Engineering or Computer Engineering or Computer Science

Tools

Zephyr RTOS

Git

Docker

Python

CAN bus

I2C/UART/SPI

Job description

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!

This role requires working onsite at the designated Enphase location.

About the role:

The Staff Firmware Engineer (Contract) will be part of Enphase’s Core Engineering R&D team, focused on the development and launch of Residential and Commercial & Industrial (C&I) Energy Storage products.

This team is responsible for designing, prototyping, validating, and scaling advanced storage systems that seamlessly integrate with Enphase’s industry-leading technologies, including the IQ Series Microinverters, EV Chargers, Combiners, and broader home energy ecosystem. The ideal candidate is passionate about embedded systems development, thrives in a fast-paced engineering environment, and collaborates effectively across multidisciplinary teams to deliver innovative, high-quality products.

What you will do:

• Design and develop firmware for STM32 and ARM Cortex-M based 32-bit microcontrollersDevelop solutions using RTOS (preferably Zephyr) for multi-core microcontrollers and support bare-metal, hard real-time applicationsDesign, develop, and maintain low-level drivers for communication interfaces including: I2C, UART, SPI
• Implement and supportCAN communication protocols Developembedded software using C and leverage Python for build automation, testing, and development workflowsWork with microcontroller peripherals including: ADC, GPIO,P
• Implement and support CAN communication protocols Developembedded software using C and leverage Python for build automation, testing, and development workflows.
• Develop and maintain secure bootloaders and secure firmware upgrade mechanisms
• Contribute toCI/CD pipelines using Git, Docker-based build systems, and automated development workflowsDevelop and execute unit tests within the Zephyr ecosystem
• Perform firmware module integration testing and system-level validation
• Collaborate with cross-functional engineering teams throughout the product development lifecycle

Who you are and what you bring:

• B. E/ B. Tech in Electrical Engineering or Computer Engineering or Computer Science.
• 8+ years’ experience in a similar (non-academic) role as an embedded software or firmware engineer
• Strong expertise in embedded firmware development for microcontroller-based systems
• Experience with TCP/IP-based industrial communication protocols, including: MQTT, Modbus
• Hands-on experience withEthernet technologies, preferably Industrial Ethernet
• Strong understanding of TLS, cybersecurity principles, and embedded application security
• Experience withBattery Management Systems (BMS), including voltage and temperature monitoring, is highly preferred
• Understanding ofState of Charge (SoC) estimation and battery algorithms is a plus
• Experience developing or supportingEnergy Management System (EMS) state machines is an added advantage
• Strong problem-solving, debugging, and collaboration skills with the ability to drive complex technical projects independently
• BMS (voltage and temperature monitoring), SoC - a plus
• EMS state machine experience is a plus