Principal Software Engineer

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Be an Early Applicant
Huntsville, AL
In-Office
126K-228K Annually
Information Technology • Software
The Role

Looking for an opportunity to make an impact?

At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers’ success. We empower our teams, contribute to our communities, and operate sustainable. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business.

Your greatest work is ahead!

Leidos Defense Systems is seeking a talented Principal Software Engineer to join a diverse team to create unique solutions for complex sensor and radar orientated problems. We have offices across the United States engaging in the defense, space, cyber and commercial fields, we provide responsive, cost-effective engineering, scientific and IT solutions.

If this sounds like the kind of environment where you can thrive, keep reading!

Leidos Defense Systems Sector provides a diverse portfolio of systems, solutions, and services covering land, sea, air, space, and cyberspace for customers worldwide. Solutions for Defense include enterprise and mission IT, large-scale intelligence systems, command and control, geospatial and data analytics, cybersecurity, logistics, training, and intelligence analysis and operations support. Our team is solving the world’s toughest security challenges for customers with “can’t fail” missions. To explore and learn more, click here!

Are you ready to make an impact? Share your resume with us today!

Primary Responsibilities

  • Candidate will support advanced technology radar programs including development of software for high-speed data acquisition, distribution, and real-time processing; integration of COTS and custom technologies into sensor systems; field testing of RF sensors and systems; and deployment of advanced sensor systems.

  • In this role you will mentor other software engineers in embedded Linux C++ development, plan or evaluate software architecture updates, develop continuous integration pipelines and maintain secure development operations.

Basic Qualifications

  • Must possess a bachelor’s degree in Computer Science or Computer Engineering degree from an ABET-accredited school with a strong demonstration of the skills listed below plus 12-15 years of experience in software development or Masters degree in Computer Science or Computer Engineering degree from an ABET-accredited school with a strong demonstration of the skills listed below plus 10-13 years of experience in software development.

  • Must have good communication skills for working in a highly collaborative lab environment.

  • Must be willing to perform technical lead duties in a software development team. This include helping other developers work through C++ issues and bugs including data corruption, deadlock, and object lifespan issues.  Candidate must be willing oversee tasking, perform code reviews for merge requests, and participate in architecture decisions by applying past experience.

  • Must have excellent teamwork skills and possess and show good fundamentals in the following:

  • Modern C++ development

  • Real-time Linux and device driver development

  • ZeroMQ messaging and pub/sub frameworks

  • Unit Test development

  • Experience with GitLab or GitHub continuous integration pipelines

  • Experience working on a radar program with an understanding of how radar data matures from sensor data to tracks.

  • Must be a US Citizen and possess and maintain a Final Secret Clearance.

  • Must be a resident of Huntsville, AL or be willing to relocate to the Huntsville, AL area.

Preferred Qualifications

Candidate with additional skills in the following is preferred, but not required:

  • MATLAB

  • NVIDIA CUDA GPU development / optimization

  • Experience with C++ math libraries like OpenBLAS

  • Experience with GitLab, Jira, gcov, lcov, Google unit test

Original Posting:June 5, 2025

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:Pay Range $126,100.00 - $227,950.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

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The Company
Alexandria, VA
27,104 Employees

What We Do

We Are Leidos

For 50 years we have been tackling some of the biggest problems that face our nation and our world.

OUR MISSION
Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020.

Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®.

Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos.

Your most important work is ahead.

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