Senior Software Developer Leidos

Skills / Requirements

• Agile
• AI-coding Tools
• AI-enabled CI/CD
• AI-generated Code Validation
• C++
• Configuration Management
• DevSecOps
• Linux
• Multi-threading
• Object-Oriented Programming
• Real-time Systems
• SCTP
• System Integration
• TCP/IP
• Test Automation
• UDP
• Vibe Coding

Why Apply

This role is ideal for developers using AI tools like Codex or Claude, especially in AI-assisted development workflows. You'll engage with AI-enabled CI/CD, testing, and DevSecOps to enhance system reliability and performance.

What You'll Be Doing

Develop and maintain software for real-time, safety-critical systems supporting air traffic services. Lead and mentor teams, engage in Agile processes, and ensure software reliability and maintainability. Collaborate on system integration and automation.

Pay and Career Growth

Competitive salary range from $107,900 to $195,050 with comprehensive benefits. The role offers leadership opportunities, including mentoring junior developers and influencing technical direction. Leidos values innovation and career growth.

Benefits and Perks

• Competitive compensation
• Health Programs
• Income Protection
• Paid Leave
• Retirement

Is This Role Right for You?

Original Job Description

Description

Leidos is seeking a Senior Software Developer to be based in Gaithersburg, MD; Eagan, MN; or Egg Harbor, NJ. This position will support the United Kingdom National Airspace System Replacement Product Delivery Team – UK NASR PDT. This effort delivers enhanced capabilities to replace and modernize the current operational system supporting UK air traffic services.

You will join a dynamic engineering team responsible for building and sustaining real-time, high-availability, safety-critical systems that directly support national airspace operations.

Location

This is a U.S.-based position that offers a balanced 50% hybrid schedule between 2-3 days in the office per week.

What You’ll Do

Design, develop, test, and maintain software for real-time, high-availability systems

Lead software development activities independently and as part of a collaborative engineering team

Analyze complex system requirements and translate them into efficient, maintainable software designs

Apply sound software engineering principles to ensure code is reliable, fault tolerant, reusable, and maintainable

Lead and mentor junior developers, influencing technical direction and development processes

Participate in Agile ceremonies including daily stand-ups, release planning, and sprint reviews

Develop, tune, document, and deploy automation scripts across development, test, and production environments

Promote code reuse, cross-program collaboration, and sustainable development practices

Support system integration activities, including hardware and low-level communications interfaces

Required Qualifications

Bachelor’s degree in Computer Science or related field with 8-12 years of relevant experience

OR Master’s degree with 6-10 years of relevant experience

Ability to obtain and maintain a Public Trust clearance

Strong object-oriented programming experience

Proficiency in C and/or C++

Experience developing real-time, multi-threaded, high-availability systems

Experience with Linux environments (Red Hat), virtual machines, and hypervisors

Experience with low-level communications protocols (TCP/IP, UDP, SCTP)

Experience with hardware or complex system integration

Familiarity with system maintenance and lifecycle concepts

Experience with source control and configuration management tools

Strong understanding of modern software development principles and best practices

Ability to plan and prioritize work effectively in a fast-paced environment

Strong verbal and written communication skills

Demonstrated ability to work independently and collaboratively

US Citizenship Required

Preferred Qualifications

Experience with Ada

Experience with test automation frameworks

Familiarity with AI coding tools and agents (Codex, Claude, or similar)

Experience with Agentic and AI-assisted development workflows, including vibe coding

Familiarity with AI-enabled CI/CD, testing, code review, and DevSecOps

Understanding of AI-generated code validation, security, and responsible use

Why Leidos

You’ll contribute to software systems where reliability, performance, and precision are essential. This is an opportunity to work on mission-critical infrastructure supporting national airspace operations — collaborating with experienced engineers to modernize complex, real-world systems.

If you are motivated by solving technically challenging problems in regulated, operational environments, we encourage you to apply.

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:

September 24, 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:

Pay Range $107,900.00 – $195,050.00

The Leidos pay range for this job level is a general guideline onlyand 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.

About Leidos

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

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 .

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com .

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission (https://reportfraud.ftc.gov/#/) .

Commitment to Non-Discrimination

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.

REQNUMBER: R-00193054

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Leidos will consider qualified applicants with criminal histories for employment in accordance with relevant Laws. Leidos is an equal opportunity employer/disability/vet.