Junior Software Developer

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

Job summary

Leidos Defense Sensors' Uncrewed Systems Integration and Test team seeks a Junior Software Engineer to join the S3I JSIL Tech & Certification Center in Huntsville, AL. You will contribute to software design, development, and integration for UAS systems, collaborating across engineering disciplines.

The role requires a BS or MS in CS or related field, 1–4 years of experience, and proficiency in OO languages (Java/C/C#), Gitlab CI/CD, and scripting.

Qualifications

• BS in CS or related technical field plus 2–4 years of experience, or MS plus 1–2 years.
• Experience with object-oriented programming in Java, C++, and C#.
• Experience using Gitlab CI/CD and scripting (Bash, Python, PowerShell).
• Understanding of UNIX/Windows command line and VM/containers.

Responsibilities

• Develop and optimize software with maintainable, scalable code.
• Create technical documentation including system designs and APIs.
• Collaborate across hardware, network, and software teams for integration.
• Evaluate new technologies to improve performance.

Skills

OOP in Java/C/C++

Gitlab CI/CD

Scripting: Bash, Python, PowerShell

Unix/Windows cmd line

Education

BS in CS or related field

MS in CS or related field

Tools

Gitlab CI/CD

Gradle

Atlassian Jira/Confluence

Job 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 Sensors' Uncrewed Systems Integration and Test 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 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. Are you ready to make an impact?

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.
• Experience with object-oriented programming in multiple languages such as java, C++, and C#.
• Experience using Gitlab CI/CD.
• Experience with scripting languages such as Bash, Python, or PowerShell including the automation of system and application installations is required.
• 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.
• 1-year+ professional software development experience.
• Excellent written and verbal communication skills.
• 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.

Pay Range

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. Original Posting: September 24, 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 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. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

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.