Senior Software Engineer

R-00187749



Leidos is seeking a Senior Software Engineer to support the development of mission-critical software for missile defense systems. The selected candidate will contribute to the design, development, integration, and demonstration of advanced software capabilities in a fast-paced engineering environment. This role requires close collaboration with integrated engineering teams and strong technical communication skills to support delivery of high-quality software solutions to customers.

Primary Responsibilities

• Develop mission-critical software in support of missile defense systems.
• Communicate and document technical solutions for integrated engineering teams in a fast-paced environment.
• Maintain awareness of current and emerging programming techniques, technologies, and development approaches.
• Conduct software design reviews and code reviews to ensure technical quality, maintainability, and compliance with program objectives.
• Collaborate with Systems Engineering teams to synchronize development activities, support scheduling priorities, and demonstrate capabilities to customers.
• Apply software engineering best practices, including debugging, testing, code review participation, and maintainability improvement.
• Plan and prioritize assigned tasks with minimal supervision while contributing effectively in a team-based development environment.
• Demonstrate initiative in identifying improved development workflows, tools, and engineering practices, including emerging AI-enabled development capabilities.

Basic Qualifications

• Bachelor’s degree in , or related technical discipline from an accredited institution, with an overall .
• of relevant technical experience, or with a master’s degree in a related field.
• required.
• required.
• Solid understanding of software engineering fundamentals, including debugging, testing, code reviews, and maintainability.
• Ability to plan and prioritize tasks with minimal supervision and communicate effectively both verbally and in writing.
• Ability to work independently on well-defined tasks and contribute effectively in a collaborative team environment.
• Demonstrated curiosity and initiative in adopting new tools and improving development workflows, including emerging AI capabilities.
• Experience using the operating system.
• Experience designing and developing software using .
• Experience with .
• Experience with such as or .
• Experience with common development tools and IDEs such as and .

Preferred Qualifications

• Experience with or other development practices.
• Experience with Agile management tools and concepts such as .
• Experience with software configuration management tools such as and .
• Proven experience mentoring developers across multiple experience levels.
• Practical experience using in a development environment, such as .
• Demonstrated ability to validate, debug, and improve AI-generated code and technical recommendations.

Clearance Requirement

• Active DoD Secret Security Clearance required.

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.
July 21, 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.

Pay Range $107,900.00 - $195,050.00

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.



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 $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com .



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 at www.leidos.com/careers/pay-benefits .



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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.