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.

Location:

On‑Site Houston, TX

This role supports Fluence product supply and development by partnering with the 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.

• 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.

• 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.