Battery Module/Pack Engineer - Battery Systems Engineering

Fluence (Nasdaq: FLNC) is a global market leader delivering intelligent energy storage and optimization software for renewables and storage. Our solutions and operational services are helping to create a more resilient grid and unlock the full potential of renewable portfolios. With gigawatts of successful implementations across nearly 50 markets, we are transforming the way we power our world for a more sustainable future. For more information, please visit fluenceenergy.com.
Job Description:
Location: On-Site Houston, TX
Role Overview
This role supports Fluence product supply and development by partnering hardware engineering lead on lithium-ion battery subsystem hardware, performance characterization, and verification testing. A working understanding of battery cell and module degradation is expected; however, the primary focus is battery electrical systems engineering and mass production of battery modules and testing (HV architecture, protection, BMS interfaces/communications, instrumentation, and validation) across internal teams, suppliers, and third-party labs.
Responsibilities include:

• Maintain in-depth knowledge of Li-ion batteries and subsystem components (cells, modules, BMS), including key electrical ratings/limits and interface requirements for energy storage products
• Support as lead engineer Fluence Energy battery module manufacturing in the US, including production readiness and technical issue resolution
• Drive product and process improvements at the production facility using data-driven methods (yield, cycle time, FPY) and controlled change management
• Partner with production teams and equipment suppliers to identify root causes of EOL test failures and production issues (containment, corrective actions, verification)
• Contribute to battery module/pack design architecture and flow requirements into manufacturable, scalable mass-production solutions; collaborate cross-functionally to deliver to schedule
• Establish battery module production readiness: define equipment/station requirements, develop procedures, and set in-process and end-of-line test checkpoints
• Collaborate with systems engineering to ensure battery technical characteristics (limits, fault behavior, comms) are reflected in overall energy storage system design
• Manage and coordinate with battery module suppliers and subcomponent vendors on requirements, changes, and technical deliverables
• Serve as the main contact for third-party lab testing of new battery equipment (e.g., protection tests, BMS communication testing, thermal validation, integration with Fluence controls, telemetry points, mechanical fit/installation)
• Gather supplier data on thermal behavior of battery modules in operation and partner with enclosure design teams to size cooling solutions for key applications

What does a qualified candidate bring to Fluence?

• Bachelor's degree (or higher) in Electrical Engineering, Mechanical Engineering, or equivalent
• 5+ years of experience developing and testing high-voltage battery systems (integration, verification, and validation)
• Experience in manufacturing/industrialization of battery cells or modules (process readiness, EOL test, quality controls)
• Broad technical knowledge across engineering disciplines (electrical, electronics, mechanical, thermal, materials, safety, test/validation, manufacturing)
• Global mindset with experience working in an international, multi-cultural matrix environment (cross-site teams and suppliers)
• Strong verbal and written communication skills (English required; Chinese is a plus), including clear technical documentation
• Self-starter who is results-oriented and process-driven, with disciplined change/configuration control
• Strong problem-solving skills, including structured root-cause analysis and data interpretation
• Willingness to travel frequently primarily within the US
• Energy storage industry experience preferred but not required

Our Culture At Fluence, our culture is the foundation that drives our ambitious growth strategy and fuels our mission to transform the future of energy. Our core cultural pillars empower us to innovate, collaborate, and lead with purpose, ensuring we continue to deliver unparalleled value to our customers and the world. Unleash Voices We believe every voice matters. We encourage openness, active listening, and decisive action to create a culture where everyone has the opportunity to contribute to our success. We foster an environment where diverse perspectives are heard and valued, driving innovation and progress. Customer Fluent Our customers are at the heart of everything we do. We're committed to delivering exceptional value that exceeds expectations by understanding our customers' needs and adapting swiftly to meet them. Our deep focus on customer satisfaction drives us to continuously improve and innovate. Infinite Impact We are committed to creating the impossible. We push boundaries to deliver sustainable, game-changing solutions that shape a brighter, more energy-efficient future for all. Our team is passionate about making a lasting impact that will resonate for generations to come. All In We are all in for growth. Our teams are relentlessly focused on identifying and seizing opportunities that propel us forward. We embrace an ownership mindset, pushing ourselves and each other to accelerate progress and create lasting success.