800V Battery Systems Engineer for Datacenter Backup

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

Benefits offered by this job

Premium health insurance for employee

Paid vacation and shutdown

401K with 9.5% company contribution

Life, AD&D, disability insurance

Catered lunches & company events

Job summary

magniX is building a compact, cross-functional team to develop an 800V stationary battery-based power supply and backup system for datacenter compute racks. The Battery Systems Engineer will define the pack architecture, cell configuration, and BMS, leveraging magniX's expertise in high-voltage battery engineering.

This role focuses on continuous high-uptime operation, with collaboration across Mechanical/Thermal and Electrical teams, and involvement in from concept through first production

Qualifications

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

Responsibilities

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

Skills

Battery design

BMS design

High‑voltage systems

Safety testing

Education

Bachelors in Electrical/Mechanical/Chemical Engineering

Tools

UL 9540/9540A

NFPA 855

Job description

magniX is building a compact, cross-functional team to develop an 800V stationary battery-based power supply and backup system for datacenter compute racks. The Battery Systems Engineer will define the pack architecture, cell configuration, and BMS, leveraging magniX's expertise in high-voltage battery engineering.

This role focuses on continuous high-uptime operation, with collaboration across Mechanical/Thermal and Electrical teams, and involvement in from concept through first production