System Engineer (HV battery)

Neev; Banbury; On-site; GBP 65,000 - 90,000; Full time

Job summary

Neev Systems Engineer in our Powertrain Systems Engineering group will drive the Battery Management System (BMS) and firmware control for our active SAE Level 5 autonomous EV platform, coordinating with cross-functional teams to optimize BMS algorithms and hardware integration.

The role includes planning firmware releases, investigating faults, and implementing updates to extend operation in production fleets, with a strong emphasis on safety and reliability in high voltage systems.

Qualifications

• BS or MS in Electrical or Computer Engineering.
• 3–5+ years in BMS and EV HV battery systems with field issue resolution.
• Deep knowledge of SOC, SOH, cell balancing, and boundary management.
• Experience with CAN, LIN, FlexRay, Ethernet, SPI, I2C for BMS integration.
• Hands-on with MATLAB/Simulink, LTspice, Python, C/C++ for algorithm dev and analysis.
• Strong communication and collaborative skills in a fast-paced production environment.

Responsibilities

• Manage electrical architectures and control strategies for BMS.
• Resolve HV battery system-level challenges and wiring updates.
• Lead firmware release and hotfix planning with cross-functional teams.
• Validate firmware updates to extend vehicle operation and safety.
• Engage with external suppliers to optimize BMS hardware and designs.
• Maintain system integration docs, DFMEA, and FTA focused on BMS faults.
• Plan and execute BMS/HV battery testing, including HIL/SIL.
• Review subsystem updates and engineering changes with teams and partners.
• Analyze telemetry and logs to drive field issue resolution.

Skills

BMS control

Firmware development

Team collaboration

Education

B.S./M.S. Electrical Engineering

Electrical/Computer Engineering

Tools

MATLAB/Simulink

LTspice

Python

C/C++

CAN tools

Job description

As a Systems Engineer within the Powertrain Systems Engineering group, you will drive the Battery Management System (BMS), firmware control engineering, and overall hardware integration for our active SAE Level 5 autonomous EV platform. You will play a pivotal role in optimizing BMS algorithms, system behaviors, and operational reliability for our deployed energy storage systems. Collaborating with a cross-functional team of exceptional engineers, you will break down complex BMS, firmware, wire harness, and system integration challenges into actionable solutions. Additionally, you will drive firmware release planning, investigate the root causes of faults, resolve hardware quality issues, and implement updates that extend our operational domains directly into our current production vehicle. ---

Responsibilities:

• Manage, troubleshoot, and refine the electrical architectures and control strategies for our current Battery Management Systems (BMS).
• Actively resolve HV battery system-level challenges, managing wire harness updates, addressing manufacturing or hardware quality issues, and ensuring seamless vehicle-level system integration.
• Take an active role in firmware release and hotfix planning, liaising with cross-functional software and controls teams to define, secure, and deploy critical updates to the production fleet.
• Integrate and validate new firmware updates to extend our vehicle operational domains, enabling enhanced system performance and safety across challenging environmental and operational conditions.
• Lead technical engagements with external suppliers to support, optimize, and improve existing BMS hardware, firmware, and associated HV battery designs.
• Maintain and update system integration documentation, DFMEA, and Fault Tree Analysis (FTA) with a strong focus on BMS fault diagnostics, contactor control, and charge/discharge handling strategies.
• Plan, lead, and execute BMS and HV battery system testing (including HIL/SIL), translating complex telemetry and test data into actionable insights to inform firmware updates and continuous improvements.
• Conduct comprehensive reviews for BMS subsystem component updates, algorithm modifications, and engineering changes with internal teams and external partners.
• Monitor active field performance by analyzing BMS telemetry and vehicle logs, performing deep root-cause analyses on control or hardware faults, validating firmware hotfixes, and driving field issues to complete resolution.

Qualifications:

• BS or MS in Electrical Engineering, Computer Engineering, or a related technical field.
• 3–5+ years of experience engineering Battery Management Systems (BMS) and EV HV battery systems, with a proven track record of sustaining products in the market and successfully solving complex field issues.
• Deep technical knowledge of BMS control algorithms, including State of Charge (SOC), State of Health (SOH), cell balancing, and charge/discharge boundary management.
• Proficiency with automotive communication protocols (CAN, LIN, FlexRay, Ethernet, SPI, I2C) essential for BMS integration and vehicle-level communication.
• Demonstrated experience and stringent safety practices working with high-voltage systems (up to 500VDC).
• Hands-on experience with simulation tools (MATLAB/Simulink, LTspice) and programming languages (Python, C, C++) used in BMS algorithm development, validation, and data analysis.
• Genuine passion for electric, autonomous mobility. Must be a highly collaborative team player with excellent communication skills, capable of thriving in a fast-paced production environment.