Senior Software Developer
Leidos
Listing collected from Leidos's career site. NextChapter is independent of Leidos.
Gaithersburg, MD · Posted October 7, 2026
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Where Gaithersburg, MD ranks
Where Gaithersburg, MD placed in our monthly rankings, month by month. Each month stays online at its own address.
November 2026
- #1Best cities for AI-skill jobs in the Mid-Atlantic30% · of 85
- #3Best cities for director and executive jobs41% · of 100
- #3Best cities for director and executive jobs in the Mid-Atlantic41% · of 85
- #8Best cities for AI-skill jobs30% · of 100
- #19Best cities for life sciences and biotech jobs82 openings · of 41
- #21Cities with the most jobs that need no experience in the Mid-Atlantic1.1% · of 84
Rankings about engineering jobs
- Best cities for software and engineering jobs #1 San Francisco (3,412 openings)
- Best cities for engineering pay after cost of living #1 San Mateo ($216k)
- Most requested AI skills in engineering jobs #1 AI tools in daily work (6.1%)
- AI tools named most often in engineering jobs #1 Claude (1.7%)
- Employers with the most engineering jobs #1 Amazon (2,992 roles)
How AI is used in this kind of work
Among software developers, AI is already used for some of the tasks. Measured exposure for software developers: 29% (some).
Share of this job’s tasks that AI is already used for at work, from real usage. It is not a forecast of job loss, and a low number means no use seen yet. Source: Anthropic Economic Index.
Leidos has filed 4 layoff notices in the last twelve months, covering 404 workers, most recently September 2026. These are public filings with state labor departments, and an open role can sit alongside them. See the filings
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About the job
Leidos is seeking Senior Software Developers to join the Air Traffic Business Area within the Homeland Sector, supporting the development of next-generation flight service and air traffic systems. This work aligns with the FAA’s broader initiative to modernize legacy flight service capabilities, replacing aging infrastructure with scalable, cloud-based platforms designed to improve safety and operational efficiency—particularly in remote and high-dependency aviation environments. These efforts focus on delivering mission-critical, future-ready solutions that provide safety-critical flight services to the pilot community.
As a member of a Scaled Agile software development organization, you will contribute to the technical execution of a program that integrates proven, globally deployed technologies with modern cloud-native capabilities. You will work alongside cross-functional teams and technical leaders to deliver predictable outcomes in a highly regulated, safety-critical environment.
In this position, you will design and implement software solutions independently while working closely with systems engineering, product delivery, and DevSecOps teams. The primary focus is on developing containerized applications within an Agile/SAFe environment. This position supports government programs and requires the ability to obtain and maintain a favorable Public Trust investigation.
Primary Responsibilities
Responsible for software development activities both individually and as a member of a team including writing, testing, debugging, and maintaining source code within an Agile environment.
Use AI-assisted development tools to accelerate coding, refactoring, debugging, and test creation.
Develop solutions to complex issues and problems that impact multiple areas or disciplines.
Actively participate in Agile scrum ceremonies and other related team activities.
Troubleshoot and participate in the resolution of technical issues in lab and operational environments.
Provide support as needed for system engineering, test engineering, and system owner teams.
Communicate with internal team members across multiple areas and client team members. May communicate with parties external to the organization.
Basic Qualifications
Bachelor’s degree in Computer Science or a related field with 8-12 years of relevant experience, or a Master’s degree with 6-10 years of experience. May also possess a Doctorate.
Expert knowledge of Java with substantial hands-on programming experience
Extensive experience with Web development and commonly used front-end tools and languages (React, HTML, CSS, JavaScript)
Extensive experience with unit testing tools such as Junit and Mockito
Significant experience with RESTful API, JSON, XML, XSD
Significant experience with Spring Framework, Spring Security, and Spring Boot
Significant experience with Linux
Significant experience with version control systems such as Git or Subversion
Experience with common development tools and IDEs (Eclipse, VS Code, etc.)
Experience working within the Agile Scrum framework
Understanding of sound software development principles and practices
Ability to effectively communicate verbally and in writing
Ability to obtain SF-85 Public Trust (Tier 2) suitability determination
US citizenship required
Preferred Qualifications
Experience with AI-assisted coding (Claude Code, Codex etc.)
Experience with microservices and cloud-based environments
Knowledge of or experience with Python programming language
Knowledge of or experience with Ansible playbooks and YAML
Knowledge of or experience with Linux shell scripting
Knowledge of or experience with MongoDB
Knowledge of air traffic control and flight services
ATMC
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: April 30, 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.