Principal Software Engineer
Epirus · Torrance, California, United States · Posted Jun 30, 2026
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About Epirus
E pirus is a high-growth technology company dedicated to overcoming the asymmetric challenges inherent to the future of national security. Epirus' flagship product, Leonidas, is a software-defined system built using intelligent power management techniques that allow power-hungry systems to do more with less.
Job Summary: This is an exciting role in an innovative, high-growth defense technology company. The ideal candidate for the
position is someone who has a breadth of knowledge developing software in embedded systems using modern
programming languages.
Responsibilities:
Building the software for real-time coordination of hundreds of intelligent power-amplified modules over
web-based services
Architecting and evolving an embedded Linux platform utilizing open-source software and web-based
microservices
Design and implementation of system management software to safely bring up, shutdown, and monitor a
distributed system of electronic components
Provide mentorship and guidance to team members in the art of embedded software development
Basic Qualifications:
BS degree in Computer Engineering, Computer Science, or related
8+ years of experience developing software in a systems programming language such as C++, Rust, or C
Experience developing resource-constrained software for embedded systems
Expert knowledge of multi-threading, parallelism, and concurrency; an ability to produce thread-safe
software modules that cooperate well together
A firm grasp of Data Structures, Algorithms, Design Patterns, and other Computer Science fundamentals
An understanding of computing performance and an ability to optimize software performance in large or
distributed systems
US Citizen or Permanent Resident (future clearance may be required)
Preferred Skills and Experience:
Strong software architecture instinct; ability to employ OOP to effectively refactor existing codebases
safely and effectively
Experience customizing Linux Kernels using Yocto and Bitbake
Experience developing software within asymmetric multiprocessing environments
Experience developing performance-critical logic on real-time operating systems (RTOS)
ITAR REQUIREMENTS:
To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR here .
At Epirus, you’ll work with technical peers and great people—and get first crack at some of the defining technology challenges of our time. Here, “impossible” is just a challenge. We're a diverse, fast-growing team of change-makers fueling the future of energy with revolutionary solutions. Join us and rewrite the rules.
As required by the Equal Pay Transparency Act, Epirus provides a reasonable range of minimum compensation for roles that may be hired. Actual compensation is influenced by a wide array of factors including but not limited to skill set, level of experience, and specific office location.
For the state of California only, the range of starting pay for this role is:
$204,000 $231,000 USD