800V Battery Systems Engineer for Data Center ESS

EV.Careers; Seattle (WA); On-site; USD 120,000 - 170,000; Full time

Benefits offered by this job

Relocation assistance

Fully paid healthcare

Strong 401(k) match

Job summary

EV.Careers is seeking a Battery Systems Engineer for a partner that develops high‑voltage battery and power‑electronics solutions. You will own the design of an 800V stationary battery pack and energy‑storage system from architecture through first production, based in Seattle.

This role hands you pack architecture, safety, BMS interfaces, and validation work to enable a new datacenter backup‑power product. Candidates should have 5+ years of battery design experience and HV Li‑ion knowledge.

Qualifications

• BS in Electrical, Mechanical, or Chemical Engineering.
• 5+ years of battery pack or BMS design experience.
• High-voltage (400V+) Li-ion pack design with module architecture and BMS integration.
• Battery safety and abuse testing experience.
• On-site in the Pacific Northwest; US work eligibility (US Persons only).

Responsibilities

• Own 800V stationary battery pack and ESS design: pack architecture and cell configuration.
• Set cycle-life, calendar-life, and thermal targets for continuous high-uptime duty.
• Own pack-level safety architecture and abuse tolerance.
• Define BMS requirements and interfaces to the converter and rack controls.
• Drive pack-level validation and testing.

Skills

Battery design experience

BMS integration

High-voltage systems

Battery safety testing

Education

BS in Electrical, Mechanical, or Chemical Engineering

Job description

EV.Careers is seeking a Battery Systems Engineer for a partner that develops high‑voltage battery and power‑electronics solutions. You will own the design of an 800V stationary battery pack and energy‑storage system from architecture through first production, based in Seattle.

This role hands you pack architecture, safety, BMS interfaces, and validation work to enable a new datacenter backup‑power product. Candidates should have 5+ years of battery design experience and HV Li‑ion knowledge.