Description
Leidos is seeking a Lead Software Developer - Early Systems Integration (ESI) 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, execute integration and test plans, procedures, and cases to verify system functionality, and performance, and maintain software for real-time, high-availability systems
Participate in agile software development activities as part of a collaborative engineering team
Analyze complex system requirements and translate them into efficient, maintainable software test plans and cases.
Lead and mentor junior integrators, influencing technical direction and promote best practices in integration and verification
Participate in Agile ceremonies including daily stand-ups, release planning, and sprint reviews as need in support of the SW teams and the build teams.
Collaborate with software engineers, system engineers, and program leadership to ensure testability of system design and alignment with project schedules
Promote 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 4–8 years of relevant experience. Additional relevant experience may be use in lieu of degree.
OR Master’s degree with 2–6 years of relevant experience
Strong object-oriented programming experience
Proficiency in Perl, Python and shell scripting
Experience developing real-time, multi-threaded, high-availability systems
Experience leading integration and test activities for complex software systems
Strong hands-on integration experience with large, distributed, or real-time 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
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
Ability to obtain and maintain a Public Trust clearance
Successful completion of background investigations as required by the government customer
Preferred Qualifications
Experience with test automation frameworks
Familiarity with AI/ML tools applied within software development workflows
Familiarity with Agile life cycle
Advanced integration experience in one or more of the following areas:
New system functionality integration
Regression testing
Problem determination and root cause analysis
Data reduction and analysis
Problem verification and change validation
Air Traffic domain knowledge or experience supporting air traffic programs
Experience operating in fast-paced, high-accountability environments requiring independent execution
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:
August 21, 2026For 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 $87,100.00 - $157,450.00The 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.
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 [email protected].
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.
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.
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