Junior Software Engineer

Build Your Software Engineering Career on a Mission That Matters

Ready to take your software engineering skills beyond the classroom and into a mission where your work has real-world impact? Leidos is seeking a talented Junior Software Engineer to join the Chinook Program supporting an Intelligence Community (IC) customer and helping evolve an application that plays an important role in national security.

As a Junior Software Engineer, you’ll work alongside experienced engineers, architects, testers, and DevSecOps professionals while gaining hands-on experience developing, integrating, testing, and delivering modern software capabilities. The Junior Software Engineer will work within an Agile development team and will receive technical guidance from senior engineers while progressively taking ownership of software components and features. You’ll have the opportunity to learn new technologies, tackle meaningful engineering challenges, and see your contributions become a part of a real operational mission.

Position may be performed in the following locations below.

Tucson, AZ

Gaithersburg, MD

Alexandria, VA

Chantilly, VA

Englewood, CO

St. Louis, MO 

Clearance Level Required:

Active Top Secret/SCI with the ability to successfully pass a Polygraph examination.

Primary Responsibilities:

• Develop, modify, test, and deploy software solutions that support our customer’s GEOINT mission under the guidance of senior engineers.
• Implement software features based on established requirements and technical designs.
• Write clean, maintainable, and well-documented code.
• Participate in code reviews and incorporate feedback from senior engineers.
• Develop and execute unit and integration tests.
• Troubleshoot software defects and assist with root-cause analysis.
• Support integration of application components and services.
• Work with REST APIs, databases, and application services.
• Participate in agile development sprints and contribute to daily stand-ups, sprint planning, and retrospectives.
• Collaborate with mission users and product managers to refine requirements and improve user experience.
• Use Git and established CI/CD processes to manage and deliver software.
• Maintain technical documentation and development artifacts.
• Support deployment and sustainment activities for the application.
• Build and maintain secure, containerized applications using technologies such as Docker, Kubernetes, and AWS.
• Support DevSecOps pipelines and ensure code meets security and accreditation standards.
• Resolve various tasks as prioritized by the team product owner.

Basic Qualifications:

• US citizenship is required per contract
• Bachelor's degree in Computer Science, Software Engineering, or related field and 2-4 years of prior relevant experience or Master’s with less than 2 years of prior relevant experience. Equivalent experience may be considered in lieu of degree.

• Experience with the following technologies:

Web: HTML, CSS, JSON, Ajax, and REST APIs

Object-oriented Programming: Python, Java, or JavaScript

Front-end and Back-end Frameworks: React, Angular, Vue.js, jQuery, Spring Boot, Django, Node.js, Flask, or Svelte

Cloud Development: AWS, Azure, or similar cloud platforms

Relational Database: MySQL, PostgreSQL, or SQL Server

Operating System: Windows, Linux

• Version Control System: Git

Understanding of modern software design patterns and coding standards.

Experience architecting, developing, and delivering complex software systems into production.

Experience with CI/CD tools (GitLab CI, Jenkins) and agile collaboration tools (JIRA, Confluence).

Familiarity with cloud environments such as AWS (C2S or GovCloud) and containerization technologies (Docker, Kubernetes)

Understanding of secure coding practices and government system accreditation processes (e.g., RMF, STIGs)

Strong, self-motivated desire to learn new programming languages, tools, frameworks, and techniques.

Preferred Qualifications:

• Experience working on a customer contract or in the Intelligence Community (IC).
• Frontend Web Development: UI/UX.
• NoSQL Database: OpenSearch/Elasticsearch.

• Cloud Exposure:

Multi-cloud architectures: AWS, IBM, Google, Azure, and Oracle.

Specific AWS Services: S3, SQS, SNS, EC2, CloudFormation and RDS.

• Familiarity with geospatial tools and standards:

GeoServer

PostGIS

OGC APIs

ESRI ArcGIS

Exposure to Infrastructure-as-Code (Terraform, Ansible).

#Chinook

#NSBA

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:

October 15, 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.