Junior Software Engineer

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 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.

Your greatest work is ahead!

Leidos’ Defense is seeking a motivated and ambitious Junior Software Engineer to join the Software, Simulation, Systems Engineering and Integration Directorate (S3I) Joint Technology Center – Systems Integration Lab (JSIL) Technology and Certification Center. This position conducts, analyzes and collaborates with subject matter experts in the planning, design, development, and utilization of software.

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

• Performs hands-on software system development from lab to field application
• Determines computing system requirements
• Analyzes system capabilities to resolve problems on program intent, output requirements, input data acquisition, programming techniques and controls
• Prepare operating instructions
• Design and develop autonomous services, desktop applications, scripts, and utility programs. End product is special use and customized software

Basic Qualifications

  

• BS degree and 2 – 4 years of prior relevant experience or Masters with less than 2 years of prior relevant experience.
• Proficiency in one or more of the following programming languages: C# or Java
• Experience with system integration, message handling, and data exchange protocols
• Familiarity with API inputs and outputs
• Understanding of markup languages (e.g., XML, YAML, HTML)
• Strong understanding of software development lifecycle, version control, and agile methodologies
• Knowledge of DevSecOps practices and CI/CD pipelines
• Familiarity with Windows and Linux OS
• Understanding of cybersecurity principles and secure coding practices
• Strong analytical and organizational skills to handle multiple tasks and projects and to work independently
• 1-year+ professional software development experience
• Excellent written and verbal communication skills.
• Must possess and be able to maintain a Secret clearance.
• Must be a resident of Huntsville, AL or willing to relocate to the Huntsville, AL area.

Preferred Qualifications

• Proficiency in one or more of the following scripting languages: Bash, Python, or PowerShell
• Effective written and oral communication skills are also required to work with all levels of staff and managers
• Proficiency in Microsoft Office

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:

March 31, 2026

Pay Range:

Pay Range $69,550.00 - $125,725.00

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.