800V Battery Systems Engineer — Datacenter Backups

magniX USA Inc; Everett (WA); On-site; USD 120,000 - 185,000; Full time

Benefits offered by this job

Company paid premiums: medical, dental

4 weeks vacation + 1-week shutdown

401K with 9.5% company contribution

Life insurance & disability

Catered lunches & company events

Job summary

magniX USA Inc. is seeking a Battery Systems Engineer in Everett, WA to design a new 800V stationary battery pack and energy storage system for datacenter backup power.

You will define the pack architecture, cell configuration, and BMS for high-uptime operation and compatibility with a datacenter rack form factor. Key responsibilities include setting cycle/calendar life targets, safety architecture per UL 9540/9540A, and coordinating with thermal engineers; you'll support verification testing

Qualifications

• Bachelors’ in Electrical, Mechanical, or Chemical Engineering.
• 5+ years in battery pack or BMS design.
• Experience with high-voltage (400V+) lithium-ion battery pack design, including module architecture and BMS integration.
• Working knowledge of battery safety and abuse testing principles.

Responsibilities

• Design a new battery pack (cell chemistry selection, module and pack architecture, BMS) for continuous, high-uptime datacenter duty.
• Define cycle life, calendar life, and thermal management targets for continuous operation.
• Define pack-level safety architecture aligned with stationary storage standards (e.g., UL 9540, UL 9540A, NFPA 855).
• Collaborate with Mechanical/Thermal Engineer to fit pack into datacenter rack form factor.
• Define BMS requirements and interfaces to power converter and rack controls.
• Support test planning and execution for pack-level validation.

Skills

Battery pack design

BMS design

High-voltage design

Safety testing principles

Education

Bachelor's degree in Electrical/Mechanical/Chemical Engineering

Job description

magniX USA Inc. is seeking a Battery Systems Engineer in Everett, WA to design a new 800V stationary battery pack and energy storage system for datacenter backup power.

You will define the pack architecture, cell configuration, and BMS for high-uptime operation and compatibility with a datacenter rack form factor. Key responsibilities include setting cycle/calendar life targets, safety architecture per UL 9540/9540A, and coordinating with thermal engineers; you'll support verification testing