Senior Software Engineer- Hardware in the Loop (HIL)

About Epirus

Epirus 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 which allow power-hungry systems to do more with less.  

Job Summary: This is an exciting role in an innovative, high-growth defense technology company. We are seeking an experienced Senior HIL Software/Hardware Engineer to lead the development, integration, and maintenance of Hardware-in-the-Loop (HIL) systems for embedded RF system validation. This role focuses on building reliable HIL platforms for testing embedded hardware and software. You will architect test benches, integrate I/O hardware, and develop automation frameworks to validate complex hardware and software systems.

Responsibilities: 

• Design and implement HIL systems, including electrical hardware, sensor/actuator interfaces, RF measurement equipment, and supporting automation software.

• Integrate and test embedded systems using physical hardware setups, mock devices, and signal generators.

• Develop automated test scripts and frameworks to support continuous integration and delivery through regression testing, integration testing, and acceptance testing.

• Capture, process, and analyze large volumes of test and system data to evaluate performance, identify trends, and support root-cause investigations.

• Create tools and dashboards for visualizing system behavior, errors, and performance metrics.

• Interface with software, electrical, and systems engineers to ensure test coverage and traceability.

• Maintain hardware setups, I/O boards, enclosures, and wiring needed for robust test environments.

• Apply structured debugging and analytical techniques to resolve complex hardware/software issues.

• Develop and maintain Epirus’s software hardware abstraction libraries, including but not limited to Oscilloscopes, VNAs, Signal Generators, Microphones, Video Capture Devices, and Robotic Measurement Equipment. 

• Provide guidance and mentorship to junior engineers and promote data-driven validation processes.

Basic Qualifications:

• Bachelor’s in Computer Science, Electrical Engineering, Computer Engineering, or related field, and 5+ years of software development experience with Python, C/C++, and Git (or 3+ years of experience with a Master’s degree)

• 3+ years of experience with HIL or automated test systems

• Strong understanding of embedded systems, digital/analog I/O, and sensor/actuator interfacing.

• Hands-on experience with communication protocols: CAN, SPI, I2C, UART, Ethernet, etc.

• Familiar with SCPI and VISA.

• Strong debugging and problem-solving skills in mixed hardware/software environments.

• Comfortable reading schematics, wiring diagrams, and working with lab equipment.

Preferred Skills and Experience:

• Experience with Drone Control Software (e,g. ArduPilot, PX4).

• Experience with test automation frameworks (e.g., Unittest, PyTest, Robot Framework, custom test rigs).

• Experience with Python data analysis Pandas, numpy, scipy, matplotlib.

• Experience with Python GUI frameworks tkinter, PySide, PyQt.

• Familiarity with RF Measurement equipment (e.g. VNA, Oscilloscopes, Power Meters).

• Desire to dive into unknown problems, derive a solution, and execute.

Additional Requirements:

• This is an in-person role based in Torrance, CA, with an expectation of 5 days per week in the office to support team collaboration and cross-functional alignment.

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:

$163,300—$187,000 USD