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About the Role

Own the LFP battery system, including pack architecture, cell selection, mechanical and thermal design, and integration. You will also own the Battery Management System (BMS), covering cell monitoring, balancing, protection, and state estimation. Define battery safety protocols, including fault detection and response, and collaborate with power electronics and firmware teams on charge, discharge, and power dispatch. The role involves taking the battery pack through build, test, and abuse testing phases.

Responsibilities

Design battery systems and integrate them into working hardware.
Deep dive into LFP and lithium-ion across cells, packs, thermal, and safety.
Design or integrate a BMS, including cell balancing and state-of-charge and state-of-health estimation.
Handle high-current, high-voltage DC design and protection.
Own the LFP battery system: pack architecture, cell selection and sourcing, mechanical and thermal design, and integration into MESH.
Own the BMS: cell monitoring, balancing, protection, contactor control, and state estimation.
Define battery safety: fault detection, isolation, and the response that keeps energy contained.
Work with power electronics and firmware on charge, discharge, and power dispatch.
Take the pack through build, test, and abuse testing.

Requirements

Experience with large-format or stationary storage, EV packs, or microgrids.
Familiarity with UN 38.3, UL 1973 or UL 1973 or UL 9540, or maritime battery standards.
Background in cell sourcing and vendor qualification.
Must be a U.S. citizen, lawful permanent resident, or protected individual.
Must be eligible to obtain and maintain a U.S. security clearance.

Skills

LFP battery systems
Battery Management System (BMS)
Cell selection
Pack architecture
Mechanical design
Thermal design
Integration
Cell monitoring
Cell balancing
Protection circuits
State estimation
Fault detection
Power electronics
Firmware
High-current DC design
High-voltage DC design
Lithium-ion batteries
Battery safety
Build and test
Abuse testing

Location

Austin, TX

Work Type

On-site

Experience Level

Founding-team equity sized for the role

Salary/Compensations

$100,000–$250,000 base

Benefits

Founding-team equity
Benefits

About the Company

First Order Effects (FOE) is building America's Infrastructure Prime for the robotic era.
Autonomous ships, drones, and robots are rewriting how the world moves, fights, and builds - but none of them work without infrastructure to power them, connect them, and launch and recover them.
Our team comes from SpaceX, Anduril, Saronic, Lockheed Skunk Works, Forterra, and Fuse Energy.
Before founding FOE, we built satellite ground stations that closed a national comms gap in days, deployed multi-megawatt power systems at commercial speed, and shipped autonomous surface vessels into Navy fleet production.
We've built infrastructure at lightspeed before - now we're applying that playbook to an entire company.

Equal Opportunity

FOE is an Equal Opportunity Employer; employment with FOE is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.