Principal Software Developer

Leidos

. Responsible for software development activities both individually and as a member of a team including writing, testing, debugging, and maintaining source code within an Agile environment .

Posted 5/1/2026full-timeGaithersburg • Maryland, Minnesota, Virginia • 🇺🇸 United StatesLead💰 $131,300 - $237,350 per yearWebsite

Tech Stack

Tools & technologies

JavaJavaScriptJUnitLinuxMockitoReactSpringSpring BootSpringBootSubversion

About the role

Key responsibilities & impact

Responsible for software development activities both individually and as a member of a team including writing, testing, debugging, and maintaining source code within an Agile environment
Work to achieve key project/program objectives
Use AI-assisted development tools to accelerate coding, refactoring, debugging, and test creation
Develop solutions to highly complex issues and problems that impact multiple areas of disciplines
Actively participate in Agile scrum ceremonies and other related team activities
Write and execute unit and functional tests
Troubleshoot and participate in the resolution of technical issues in lab and operational environments
Provide support as needed for system engineering, test engineering, and system owner teams
Ability to communicate with executive leadership (internally or client) regarding matters of significant importance to the organization/project

Requirements

What you’ll need

Bachelor’s degree in Computer Science or a related field with 12-15 years of relevant experience or a Master’s degree with 10-13 years of experience
In-depth knowledge of Java with substantial hands-on programming experience
In-depth experience with Web development and commonly used front-end tools and languages (React, HTML, CSS, JavaScript)
Extensive experience with unit testing tools such as Junit and Mockito
Significant experience with RESTful API, JSON, XML, XSD
Significant experience with Spring Framework, Spring Security, and Spring Boot
Significant experience with Linux
Significant experience with version control systems such as Git or Subversion
Experience with common development tools and IDEs (Eclipse, VS Code, etc.)
Experience working within the Agile Scrum framework
Understanding of sound software development principles and practices
Ability to effectively communicate verbally and in writing
Capable of leading and managing work of other technical staff that has significant impact on project results and outputs
Ability to obtain SF-85 Public Trust (Tier 2) suitability determination
US citizenship required

Benefits

Comp & perks

Health and Wellness programs
Income Protection
Paid Leave
Retirement

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

JavaWeb developmentReactHTMLCSSJavaScriptJUnitMockitoRESTful APISpring Framework

Soft Skills

communicationleadershipteam collaborationproblem-solvingtroubleshootingAgile methodologyverbal communicationwritten communication

Certifications

Bachelor’s degree in Computer ScienceMaster’s degree in Computer ScienceSF-85 Public Trust (Tier 2)