Electrical Engineer (Battery Systems & BMS)

First Order Effects; Austin (TX); On-site; USD 100,000 - 250,000; Full time

Job summary

First Order Effects in Austin, TX is seeking an Electrical Engineer focused on Battery Systems & BMS. You will own the LFP battery system, pack architecture, cell sourcing, and integration into MESH, ensuring safety and reliability for high-performance energy storage.

You will collaborate on power electronics and firmware for charge/discharge and power dispatch, and drive build, test, and abuse testing of the pack.

Qualifications

• Experience with large-format or stationary storage, EV packs, or microgrids.
• Familiarity with battery safety standards (UN 38.3, UL 1973/UL 9540) and maritime battery standards.
• Background in cell sourcing and vendor qualification.

Responsibilities

• Design battery systems and put them into working hardware.
• Go deep on LFP and lithium-ion across cells, packs, thermal, and safety.
• Design or integrate a BMS, including cell balancing and state-of-charge/state-of-health estimation.
• Handle high-current, high-voltage DC design and protection.

Skills

Battery systems design

BMS design

Thermal design

High-current DC design

Cell sourcing

Job description

FIRST ORDER EFFECTS

Electrical Engineer (Battery Systems & BMS)

Infrastructure for the Autonomous Era · First in. First up.

On-site · Austin, TX

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MESH stores its energy in batteries, and that energy has to be safe, measured, and ready on demand. You own the pack and the brains that keep it that way, from cell selection to a system that charges, discharges, and protects itself in the field. In a power-storage product, this is core IP, and it is yours.

Who We Are

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. That's what we build.

We've Built Cutting Edge Systems at Legendary Companies

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.

The Role

• 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.

What You'll Do

• Design battery systems and put them into working hardware.

• Go deep on 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.

What We're Looking For

• Experience with large-format or stationary storage, EV packs, or microgrids.

• Familiarity with UN 38.3, UL 1973 or UL 9540, or maritime battery standards.

• A background in cell sourcing and vendor qualification.

Compensation

$100,000–$250,000 base + founding-team equity sized for the role + benefits. If you're an outlier, we'll pay like it.

ITAR requirement

To conform to U.S. Government export regulations (ITAR/EAR), applicants must be a U.S. citizen, lawful permanent resident, or protected individual as defined by 8 U.S.C. 1324b(a)(3). Candidates must be eligible to obtain and maintain a U.S. security clearance; active clearance not required.

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.

Sovereignty is built, not declared — come build it with us.