Junior Software Engineer

Leidos LLC; Huntsville (AL); On-site; USD 58,000 - 105,000; Full time

Job summary

Leidos Defense Systems is seeking a Software Engineer to develop high-performance applications and backend systems supporting advanced sensors and mission systems. The role involves building solutions in C++, .NET, and C#, following Agile practices.

You will design, implement, test, and review code, with opportunities to grow into broader system-level development and real-time challenges. Clearance prospects may be required for some positions.

Qualifications

• Bachelor's degree in Software Engineering, Computer Science, Computer Engineering or equivalent.
• Experience with Linux environments and C# development.
• Familiarity with unit tests, code reviews, docs and scripting concepts.

Responsibilities

• Develop high-performance applications and backend systems for defense-related sensors and mission systems.
• Collaborate in an Agile software environment, write tests, and perform peer reviews.
• Work with C++, .NET, and C# to deliver robust software solutions.

Skills

Linux

C#

Unit Tests

Code Reviews

Documentation/Writing

Networking

Scripting

DevOps/CI

Git

Education

Bachelor's degree in Software Engineering or related

Tools

Git

Podman

Docker

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 doing 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 Systems is seeking a talented Software Engineer to develop high-performance applications and backend systems supporting advanced sensors and mission systems. This role is ideal for engineers who enjoy building performant software today while growing into broader system-level and real-time development over time. We have offices across the United States engaging in the defense, space, cyber and commercial fields, we provide responsive, cost-effective engineering, scientific and IT solutions. 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.

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.

Primary Responsibilities

In this mission we develop training software solutions for our customers in the area of Unmanned Aerial Systems simulation. We use our skills to design and implement new features, fix bugs, perform peer reviews, write tests, analyze new technologies and best practices, and collaborate with other teammates. We develop solutions in C++, .NET, and C#. The team follows Agile software practices, shares a passion for solving complex problems, delivering exceptional software, improving software development processes, and exceeding customer expectations.

Basic Qualifications

Candidate must possess at least a bachelor’s degree in Software Engineering, Computer Science, Computer Engineering, Electrical Engineering, Aerospace Engineering, Mathematics, or equivalent technical degree Must be able to obtain and maintain a SECRET Clearance. Experience in the following technologies:LinuxC#SCMDatabases Experience in the following concepts:Units TestsCode ReviewsDocumentation/Writing SkillsCommunication NetworkingScriptingDevOps/Continuous Integration Continuous Development. Preferred experience in the following technologies:Git SCMPodman/Docker in air-gapped environmentsProtobufPostgres/SQLKubernetesHelmOpenShift. Preferred experience in the following concepts:ContainerizationAsynchronous DevelopememtDistributed SystemsAPI DesignVM ManagementExperience managing databases within a cluster.

Pay Range

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.

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.

Original Posting

Original Posting: October 7, 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.

Company Overview

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 $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.