Senior Embedded Software Engineer

Eos Energy Enterprises, Inc. is accelerating the shift to American energy independence with positively ingenious solutions that transform how the world stores power. Our breakthrough Znyth™ aqueous zinc battery was designed to overcome the limitations of conventional lithium-ion technology. It is safe, scalable, efficient, sustainable, manufactured in the U.S., and the core of our innovative systems that today provides utility, industrial, and commercial customers with a proven, reliable energy storage alternative for 3 to 12-hour applications. Eos was founded in 2008 and is headquartered in Edison, New Jersey. For more information about Eos (NASDAQ: EOSE), visit eose.com.

Experienced Embedded Software Engineer to design, develop, and optimize firmware for Battery Management Systems specifically tailored to zinc-bromide battery technologies. This role involves creating microcontroller-based solutions using the V-model of software design and testing, ensuring systematic and traceable development with a strong focus on safety compliance according to IEC 60730 Annex H. The engineer will integrate microcontrollers like the STM32 family, implement communication protocols such as CAN/CANFD and RS-485, and interface analog-to-digital converters (ADCs) with sensors to monitor critical parameters of zinc-bromide batteries.

Responsibilities

• Lead a team of engineers to design and develop BMS Firmware: Create and maintain firmware for microcontrollers, primarily focusing on STM32 family devices, using the V-model to ensure structured development and safety compliance with IEC 60730.
• Implement BMS Communication Protocols: Design and implement communication interfaces such as CAN/CANFD and RS-485 to support real-time data transmission and control specific to zinc-bromide battery systems.
• Develop BMS Safety Features: Design diagnostics, self-test functions, and fail-safe mechanisms aligned with IEC 60730 Annex H. Implement functions such as overvoltage/undervoltage protection, current balancing, electrolyte monitoring, and fault detection to ensure BMS safety and reliability.
• Analog-to-Digital Integration for Battery Monitoring: Interface and configure ADCs to accurately measure voltage, current, electrolyte levels, and temperature parameters for zinc-bromide batteries, enabling real-time monitoring and management of State of Charge (SoC) and State of Health (SoH).
• V-Model Testing for BMS: Apply the V-model approach to verify and validate safety-critical functions at each development phase, ensuring comprehensive compliance, traceability, and reliability of zinc-bromide BMS.
• Hardware-Software Integration: Collaborate with hardware engineers to ensure proper integration of firmware with BMS hardware components, including sensors, and power electronics, conducting safety validation and performance testing.
• Documentation and Compliance: Develop detailed technical documentation, including design specifications, test plans, and compliance reports, in line with IEC 60730 Annex H and V-model methodologies.
• Stay Updated: Keep abreast of the latest advancements in BMS design, microcontroller platforms, safety standards, and communication protocols relevant to energy storage systems.
• Collaborate with and support other groups in the company in developing user-friendly tools for troubleshooting and commissioning.
• Participate in future product roadmap development.
• Ensure a safe work environment by following health and safety guidelines and policies.
• Lead and conduct root cause failure investigations.
• Develop robust and efficient software/firmware engineering processes.
• Work with the engineering team to complete and maintain software documentation of current and new products.
• Other duties, responsibilities and activities may change or be assigned at any time with or without notice.

Knowledge, Skills, and Abilities

• Proficient in C/C++ for embedded systems development.
• Ability to rapidly prototype software solutions using C/C++ and other relevant programming languages, frameworks, and libraries.
• Knowledge of embedded systems development, including familiarity with microcontrollers, memories, A/D converters and real-time operating systems (RTOS).
• Familiarity with communication protocols commonly used in battery systems, such as CAN bus, Modbus, SPI, and I2C.
• Proficient in debugging tools, oscilloscopes, logic analyzers, and protocol analyzers.
• Ability to work independently and collaboratively within a cross-functional engineering team.
• Strong problem-solving skills and the ability to troubleshoot complex software issues in a timely manner.
• Excellent communication skills, with the ability to clearly document and explain safety-critical design and testing concepts.

Desired Skills

• Familiarity with BMS algorithms for SoC and SoH estimation - knowledge of zinc-bromide batteries is a plus.
• Knowledge of embedded security principles, including secure bootloaders and encryption for BMS communication.

Education and Experience

• Bachelor's degree in electrical engineering, computer engineering, or related field required.
• Minimum of 8 years' experience

Travel

• Local Travel: Less than 10%
• Overnight/North America: Less than 10%

Working Conditions

• Office Environment - Must be able to remain in a stationary position 50% of the time and occasionally move about inside the office to access file cabinets, office machinery, etc. Required to have close visual acuity to perform an activity such as: preparing and analyzing data and figures; transcribing; viewing a computer terminal; extensive reading. May be required to exert up to 25 pounds of force occasionally to lift, carry, push, pull or otherwise move objects, including the human body.
• Factory - The worker may be subject to hazards. Includes a variety of physical conditions, such as proximity to moving mechanical parts, vibration, moving vehicles, electrical current, exposure to temperature changes or exposure to chemicals. While performing the duties of this job, the employee may be exposed to fumes, airborne particles, odors, dust, mists, and gases. The noise level in the work environment can be loud. Required to have close visual acuity to perform an activity such as: preparing and analyzing data and figures; transcribing; viewing a computer terminal; extensive reading; visual inspection involving small defects, small parts, and/or operation of machines (including inspection); using measurement devices; and/or assembly or fabrication parts at distances close to the eyes. Machinery operation requires the use of safety equipment to include but not limited to eye safety glasses, hearing protectors, work boots, and lab coats. May be required to exert up to 50 pounds of force occasionally to lift, carry, push, pull or otherwise move objects, including the human body.
• Customer/Partner Locations - Employee may visit customer or partner locations that may be comprised of office, manufacturing floor, laboratory environments and construction sites depending on the location and reason for visit.