Senior Software Developer 00100 Leidos

Skills / Requirements

• Agile
• AI-assisted Development
• AI-coding Tools
• AI-generated Code Validation
• C++
• Configuration Management
• DevSecOps
• Linux
• Multi-threaded Systems
• Object-Oriented Programming
• Real-time Systems
• SCTP
• Source Control
• System Integration
• TCP/IP
• Test Automation
• UDP
• Vibe Coding

Why Apply

This role is ideal for developers familiar with AI coding tools like Codex and Claude. You'll engage in AI-assisted development workflows, enhancing real-time, high-availability systems with advanced automation.

What You'll Be Doing

Develop and maintain software for safety-critical air traffic systems. Lead and mentor developers, ensuring code reliability and system integration. Engage in Agile practices and support automation across environments.

Pay and Career Growth

The salary range is $107,900 to $195,050, reflecting the role's seniority and complexity. Leidos offers competitive benefits, including health programs and retirement plans, supporting long-term career growth.

Benefits and Perks

• Competitive compensation
• Health and Wellness programs
• Income Protection
• Paid Leave
• Retirement

Is This Role Right for You?

Original Job 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 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 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. 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 here. Securing Your Data Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to spam.leidos@leidos.com. Commitment and Diversity 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.