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.
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
Original Posting:August 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 $87,100.00 - $157,450.00
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.
