Software Engineer, Full Stack Developer, Java Developer

Job Summary

The Defense Sector at Leidos is looking for a Software Engineer with 4+ years of professional experience to join a collaborative, product-focused engineering team. This role involves design, development, testing, and delivery of software primarily in Java, Rust, JavaScript, and React, while supporting Agile scrum teams and contributing to technical solutions from concept to delivery.

This position allows telework, but the candidate must be within a reasonable driving distance to Arlington, VA or Alexandria, VA, and be able to come on site when requested.

• Design, develop, and maintain software solutions using Java, Rust, JavaScript, and React
• Drive end-to-end technical solutions, including architecture, implementation, testing, and deployment
• Partner with product owners and stakeholders to translate requirements into scalable, maintainable designs
• Build and enhance user-facing features using React, as well as backend services and APIs
• Champion automated testing, code quality, and continuous integration/continuous delivery (CI/CD) practices
• Leverage generative AI tools to improve developer productivity, testing, and documentation where appropriate
• Lead code reviews, mentor engineers, and promote best practices across the team
• Facilitate or actively contribute to Agile ceremonies using Jira (sprint planning, stand‑ups, retrospectives)
• Incorporate user and stakeholder feedback to improve software functionality, usability, and performance
• Identify technical risks and drive solutions that balance speed, quality, and maintainability

• US Citizen with at least an active Top Secret clearance with the ability to obtain a SCI
• Bachelor's degree in a relevant field and 4+ years of professional software development experience or a Master's degree with 2+ years of experience. Additional experience may be considered in lieu of a degree
• Strong experience with Java, Rust, JavaScript, and React, or deep expertise in several with the ability to lead across the full stack
• Demonstrated experience working in Agile/Scrum environments and leading or guiding scrum teams
• Experience driving technical solutions and making architecture or design decisions
• Proficiency with Jira or similar Agile project management tools
• Strong background in automated testing (unit, integration, and/or end‑to‑end)
• Excellent communication skills and the ability to collaborate across disciplines
• Self‑motivated desire to learn new programming languages, tools, frameworks, and techniques

• US Citizen with an active TS/SCI security clearance
• Experience with CI/CD pipelines and continuous delivery practices
• Familiarity with frontend testing frameworks (e.g., Jest, React Testing Library, Cypress)
• Experience building cloud‑based or distributed systems
• Experience using AI‑assisted development tools in production environments
• Understanding of usability, accessibility, and user‑centered design principles

• Opportunity to work on impactful software products delivered continuously to users
• A collaborative team environment that values learning, feedback, and improvement
• Support for modern development practices, automation, and emerging tools
• Competitive compensation and comprehensive benefits package

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.