Software Engineer

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 sustainably. Everything we do is built on a commitment to doing the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business.

Leidos Defense Systems is seeking a talented Software Engineer to develop high-performance applications and backend systems supporting advanced sensor and mission systems. This role is ideal for early career Engineers who want to build strong software fundamentals while gaining exposure to high-performance and real-time systems. We have offices across the United States engaging in the defense, space, cyber and commercial fields and provide responsive, cost-effective engineering, scientific and IT solutions.

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!

Primary Responsibilities:

• Support advanced technology radar programs.

• Develop user-facing and backend software that interfaces with high-performance sensor and data processing systems.

• Contribute to development of C++ applications and backend systems.

• Support integration, testing, and debugging of software.

• Assist in improving performance and reliability of systems.

• Collaborate with team members across software, systems, and hardware disciplines.

• Learn and apply best practices in systems and performance-oriented software development.

Basic Qualifications:

• Bachelor's degree in Electrical Engineering, Computer Engineering, or Computer Science from an ABET-accredited school.

• Experience with at least one programming language such as C++, Java, Python, or similar.

• Experience with developing software through an academic, internship, or personal project.

• Exposure to Linux, systems programming, or concurrent programming concepts.

• Understanding of data structures, algorithms, and core computer science fundamentals.

• Understanding of performance, data flow, and system behavior.

• Strong teamwork and problem-solving skills.

• Ability to work effectively in a team environment.

• Ability to learn new technologies and work across different layers of the software stack.

• Ability to reside or willing to relocate to the Huntsville, AL area to work on-site.

• Ability to obtain and maintain Secret Security Clearance.

• U.S. Citizenship required.

Preferred Qualifications:

• Exposure to messaging frameworks such as ZeroMQ or similar.

• Exposure to containerization and CI/CD pipelines.

• Exposure to tools such as MATLAB or similar for analysis or prototyping.

• Interest in radar, RF, or sensor systems.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

September 21, 2026

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 $57,850.00 - $104,575.00

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.