Junior Software Engineer

Leidos; Huntsville (AL); On-site; USD 70,000 - 126,000; Full time

Benefits offered by this job

Health and Wellness programs

Income Protection

Paid Leave

Retirement

Job summary

Leidos is seeking a Junior Software Engineer in Huntsville to join the JSIL Technology and Certification Center within the S3I Directorate. You will aid design, develop, and optimize software for UAS-related systems, collaborating with hardware, network, and software teams to integration efforts.

The role requires 2–4 years of related experience (or 1–2 years with an MS) and hands-on work with Java/C++/C#, scripting, and CI/CD tooling. Onsite work in Huntsville is required.

Qualifications

• BS degree in computer science or related technical degree plus 2-4 years of prior relevant experience or MS degree in computer science or related technical degree plus 1-2 years of prior relevant experience.
• Strong experience with object-oriented programming in multiple languages such as java, C++, and C#.
• Strong experience using Gitlab CI/CD.
• Strong experience with scripting languages such as Bash, Python, or PowerShell including the automation of system and application installations is required.
• Strong understanding of general computing system architectures and virtual machines/containers.
• Strong command line experience with UNIX based operating system or Windows command line configuration is required.
• Strong analytical and organizational skills to handle multiple tasks and projects and to work independently
• Excellent written and verbal communication skills.
• Must be willing to work onsite 100%
• Must be a US citizen, possess be able to maintain an active Secret clearance.
• Must be a resident of Huntsville, AL or willing to relocate to the Huntsville, AL area.

Responsibilities

• Software Development & Optimization: Support the design and implementation of software solutions, ensuring high-quality, maintainable, and scalable code. Assist with efforts in debugging, and optimization for large-scale systems.
• Documentation & Communication: Responsible for creation of detailed technical documentation, including system designs, APIs, and architectural diagrams. Communicate complex technical concepts clearly to non-technical stakeholders and executives.
• Cross-Functional Collaboration: Collaborate with managers, hardware engineers, network engineers, and other stakeholders to implement system requirements and ensure seamless integration between software, hardware, and network components.
• Innovation & Technology Evaluation: Stay current on emerging technologies and industry trends, new tools, frameworks, and methodologies that improve the development process and system performance.

Skills

Java

C++

C#

Python

Bash

PowerShell

UNIX

GitLab CI/CD

Command line

Education

B.S. in Computer Science

M.S. in Computer Science

Tools

Gradle

GitLab

Atlassian tools

Job description

Description

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 Uncrewed Systems Integration and Test is seeking a motivated and ambitious Junior Software Engineerto join the Software, Simulation, Systems Engineering and Integration Directorate (S3I) Joint Technology Center – Systems Integration Lab (JSIL) Technology and Certification Center. This position collaborates with subject matter experts in the requirements, design, development, and implementation of UAS related 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.

Primary Responsibilities

• Software Development & Optimization: Support the design and implementation of software solutions, ensuring high-quality, maintainable, and scalable code. Assist with efforts in debugging, and optimization for large-scale systems.

• Documentation & Communication: Responsible for creation of detailed technical documentation, including system designs, APIs, and architectural diagrams. Communicate complex technical concepts clearly to non-technical stakeholders and executives.

• Cross-Functional Collaboration: Collaborate with managers, hardware engineers, network engineers, and other stakeholders to implement system requirements and ensure seamless integration between software, hardware, and network components.

• Innovation & Technology Evaluation: Stay current on emerging technologies and industry trends, new tools, frameworks, and methodologies that improve the development process and system performance.

Basic Qualifications

• BS degree in computer science or related technical degree plus 2-4 years of prior relevant experience or MS degree in computer science or related technical degree plus 1-2 years of prior relevant experience.

• Strong experience with object-oriented programming in multiple languages such as java, C++, and C#.

• Strong experience using Gitlab CI/CD.

• Strong experience with scripting languages such as Bash, Python, or PowerShell including the automation of system and application installations is required.

• Strong understanding of general computing system architectures and virtual machines/containers.

• Strong command line experience with UNIX based operating system or Windows command line configuration is required.

• Strong analytical and organizational skills to handle multiple tasks and projects and to work independently

• Excellent written and verbal communication skills.

• Must be willing to work onsite 100%

• Must be a US citizen, possess be able to maintain an active Secret clearance.

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

Preferred Qualifications.

• Experience with Atlassian workflow management software.
• Experience with software development and testing
• Experience with Uncrewed Aircraft Systems.
• Experience using Gradle.
• Willingness to be hands-on with the hardware away from assigned desk.

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:

August 12, 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 $69,550.00 - $125,725.00

The Leidos pay range for this job level is a general guideline onlyand 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.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers.

• competitive compensation
• Health and Wellness programs
• Income Protection
• Paid Leave
• Retirement

More details are available at www.leidos.com/careers/pay-benefits.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.