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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 do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business.

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Leidos’ Defense Systems Land Systems is seeking a Modeling and Simulation Software Developer to join our team…with the ability and experience to work missile defense projects within the BMD Simulations and Analysis Portfolio. As a Software Developer, you’ll directly support the Agile Software Development in achieving specific program objectives in support of our nation’s defense. In this role, you will also develop, create, and modify general computer applications software or specialized utility programs. Also, analyze user needs and develop software solutions for our customer. The ideal candidate will possess excellent analytical and problem-solving skills, be a strong team player, and can establish solid working relationships with peers and technical staff members within the program.

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

• Perform high-level software development functions using C++, Java or similar languages including design, development, troubleshooting, and debugging software programs.
• Collaborate with other experts within the program and in the user community to design, develop, and debug existing software, and to design and develop enhancements that incorporate new capabilities into various components of the existing systems.
• Responsible for using sound software engineering principles to ensure that developed code is modifiable, efficient, reliable, understandable, fault tolerant, and reusable, including providing software process management and control throughout the coding portion of the software development process.
• Creating and running automated software builds and pipelines in a Continuous Integration/Continuous Deployment (CI/CD) environment
• Contribute to software development activities as a member of an agile team and actively participate in program increment planning, Feature and Story development, Sprint Planning, Demos, Iteration Retrospectives and related team activities.

Basic Qualifications

• Bachelor’s degree with 4-8 years of prior relevant experience or Masters with 2-6 years of prior relevant experience
• Proficient in C++
• Experience with Red Hat Enterprise Linux OS
• Experience programming network connections (message generation, formatting, UDP and TCP/IP interfaces)
• Creating and running unit test
• Developing software documentation
• Creating and running automated software builds and pipelines in a Continuous Integration/Continuous Deployment (CI/CD) environment
• Collaborating with Stakeholders and Government customers
• Working within an Agile team environment, to include Program Increment Planning, Iteration Planning, Feature and Story development, Sprint Planning, and Iteration Retrospectives.
• Participating in demos for the team and program Sprint reviews
• Must be a US citizen possess and be able to maintain an active secret clearance
• Full time onsite support
• Must be a resident of the North Alabama area.

Preferred Qualifications

• Knowledge of Agile methodologies, such as the Scaled Agile Framework (SAFe), and application of the Agile methodologies within a technical/engineering environment
• Experience developing and/or supporting CI/CD pipelines (Ansible, Jenkins)
• Experience with Python or Java and user interfaces
• Familiarity with Jira - issue tracking and agile project management, or similar tool
• Experience with Multi-core and multi-threaded programming
• Relevant DoD and/or Industry work experience in Missile Defense

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:

January 23, 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 $87,100.00 - $157,450.00

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.