Brelle & Co, Inc.

Engineering the Future of High-Performance Energy

Brelle & Co, Inc. is building the next generation of modular energy platforms for the world's most demanding machines. Founded in 2024 and headquartered in Los Alamitos, California, the company develops high-performance battery and software systems for electric and hybrid vehicles, aerospace, and advanced robotics. With a focus on fast charging, modular architecture, and intelligent thermal management, Brelle is pushing the boundaries of what is possible in electrified performance. The company recently secured a $9.7 million Seed round backed by Automotive Ventures and Refactor Capital to accelerate its hardware and software development.

A Culture of Frontier Innovation

At Brelle, the culture is deeply rooted in hardware and software co-design. The team operates at the intersection of mechanical engineering, embedded systems, and artificial intelligence, treating battery systems not just as power storage, but as intelligent platforms. The environment is fast-paced and hands-on, requiring engineers who thrive on solving complex physical and computational challenges. Collaboration is key, as cross-functional teams work closely to integrate liquid-cooled battery modules with embedded automotive code and AI-driven software.

What You'll Actually Do

Your day-to-day at Brelle will heavily depend on your domain. Embedded Firmware Engineers focus on building the software foundation of the energy platform, writing bare-metal code, and optimizing battery management systems. Mechanical Design Engineers are hands-on with prototyping, thermal modeling, and designing lightweight, high-performance battery packs. Technical Program Managers bridge the gap between hardware and software, ensuring that complex physical systems align with aggressive development timelines. The work is highly technical, involving rapid iteration and rigorous testing of modular architectures.

Compensation & Benefits

While specific compensation data for Brelle is limited publicly, the company offers competitive packages typical of early-stage deep tech startups in Southern California. Job postings indicate salaries for senior engineering roles, such as Director of Battery Engineering, can range from $200K to $230K, while Senior Mechanical Design Engineers typically see ranges between $140K and $175K. As a Seed-stage company, equity is a significant component of the total compensation package, offering early employees substantial upside as the company scales.

The Interview Process

The interview process at Brelle reflects its deep tech focus. Candidates can expect an initial screening followed by deep-dive technical rounds. For software and firmware roles, this involves embedded systems architecture, C/C++ coding, and real-time operating systems (RTOS) discussions. Hardware candidates typically face questions on thermal management, battery chemistry, and mechanical design principles. The final stages usually involve a cross-functional panel and a cultural fit interview with the founding team, focusing on problem-solving abilities and adaptability in a fast-paced startup environment.

Why Join / Why Not

Why Join: If you are passionate about the electrification of high-performance machines and want to work on frontier technology, Brelle offers a unique opportunity. You will have outsized ownership of critical systems, working on products that power supercars, aerospace vehicles, and advanced robotics. The company is well-funded by top-tier mobility and deep tech investors, providing a solid runway for innovation.

Why Not: This is an early-stage hardware startup, which means the hours can be long and the pressure to deliver functional prototypes is high. If you prefer the stability of a large corporation, structured mentorship programs, or a purely remote work environment, Brelle's hands-on, on-site culture in Los Alamitos might not be the right fit.