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About the Role

Leidos has a new and exciting opportunity for an Applications Software Engineer in our National Security Sector's (NSS) Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. Join us and make a difference in National Security!

Responsibilities

Work on a mix of web service development, full stack web application development, and robust persistence layer implementations in an Agile Scrum environment.
Utilize Themes, Epics, User Stories, and acceptance criteria as part of an Agile team.
Apply software engineering best practices and clean coding techniques to ensure code is maintainable, efficient, reliable, understandable, secure, fault tolerant, and meets S.O.L.I.D coding principles.
Apply secure software development principles and techniques.
Use software tools in cooperation with continuous integration and test automation management processes.
Understand software components and their interface requirements.
Interface with software engineers, system engineers, information assurance engineers, test engineers, quality assurance, and other project team members.
Set standards and help the team adopt and adhere to Test Driven Development (TDD) practices within the Leidos Agile Framework.

Requirements

BS Degree in Computer Science or equivalent and 8+ years of relevant experience (experience in lieu of degree will be considered).
Active Secret Clearance.
Experience with web-based (HTML, CSS, JavaScript) in a web-based environment.
Experience in Scrum Methodology or other Agile environments (e.g., SAFe, XP).
Experience with UI / Development Frameworks (E.g, AngularJS, Ionic, GWT, SmartGWT, Qt, React, Node.js).
Experience with Automated Testing Tools/Technologies/Concepts (Selenium, Cucumber, Gherkin, BDD).
Experience with Test Driven Development (TDD).
Works well in a team environment.
Excellent written and communication skills.
DoD 8570 approved security certification (i.e., Security +) (Will be required 90 days after hire).

Skills

Web service development
Full stack web application development
Persistence layer implementations
Agile Scrum
Software engineering best practices
Clean coding techniques
S.O.L.I.D coding principles
Secure software development
Continuous integration
Test automation
Test Driven Development (TDD)
Web-based (HTML, CSS, JavaScript)
UI / Development Frameworks (AngularJS, Ionic, GWT, SmartGWT, Qt, React, Node.js)
Automated Testing Tools/Technologies/Concepts (Selenium, Cucumber, Gherkin, BDD)
Web Services Architectures (REST, SOAP, AWS)
Software CM (Git, GitHub)
Continuous Integration / Quality, and DevOps concepts and tools / technologies (Ant / Maven, Jenkins, SonarQube, FishEye, Crucible, Gradle, Junit)
Security Scanning (HP Fortify, HP WebInspect)
Build Scripts (Maven, ANT)
Mobile Application Development
Agile Management Tools and Concepts (VersionOne, JIRA, Rally, etc.)
Web Server Configuration (JBOSS, Wildfly, Tomcat)
Database Development (Postgres, SQL Server, MySQL, SQLite, Oracle)

Location

National Security Sector

Work Type

Full-time

Experience Level

8+ years of relevant experience

Education Level

BS Degree in Computer Science or equivalent

Salary/Compensations

$107,900.00 - $195,050.00

Benefits

Paid Time Off
11 paid Holidays
401K with a 6% company match and immediate vesting
Flexible Schedules
Discounted Stock Purchase Plans
Technical Upskilling
Education and Training Support
Parental Paid Leave
Competitive compensation
Health and Wellness programs
Income Protection
Paid Leave
Retirement

About the Company

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.
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.

Equal Opportunity

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.