Senior Software Engineer

Leidos is seeking a Software Developer for a 200+ FTE technical development program supporting the Sponsor’s Entitlement Programs as well as IdAM /ICAM, Authentication, Authorization, Attributes and Digital Policy Management. The Software Engineer will work with a large team of developers, software engineers and data engineers. The successfully candidate will support continuity of our customer’s mission by helping to modernize and implement industry standards while ensuring secure, reliable, and uninterrupted availability of IT systems.Primary ResponsibilitiesExperience in modernization of legacy applications (new software development)Strong communication, design, and documentation skillsComfort and familiarity in maintaining legacy applicationsStrong time and workflow management skillsComfort and familiarity designing and utilizing custom ETL methodologyKnowledge/experience with the development of Cloudformation scripts to generate network and applicationinfrastructure in a repeatable fashionAbility to write custom scripts to install and configure code in EC2 instancesComfort and familiarity in unit testing, peer code review, and automated testing techniques like Selenium (create, edit, maintain, execute)Experience with Python.Develop Java and Python applications that leverage Neo4j and ElasticsearchAbility to Implement NodeJS PM2 for application monitoring and resiliencyUtilized SAFe agile techniques to manage workloadLeverage Amazon Web ServicesExperience creating RESTful APIWillingness to mentor and teach junior developers’ community best practices in a constructive fashionWork within the parameters of Agile & Scrum methodologiesAbility to methodically think through new and exciting challenges in a collaborative team environment in order to provide technically sound solutionsRequired SkillsActive TS/SCI with PolygraphBachelor's degree and 8+ years of experience. Additional experience in lieu of degree.Must have experience with Java, Springboot, Python and the Cloud / Amazon Web ServicesPrior experience reading and developing solutions to customer requirementsKnowledge of Git, Jenkins, or RundeckExperiencing working in Command Line (RH Linux)Desired SkillsExperience with Angular is preferredCertification - Amazon Web Services (AWS)Understanding and knowledge with Identity and Accessibility development practicesExperience with automation methodologies like SeleniumExperience with containerization and modular developmentFamiliarity with UI/UX DesignFull Stack DevelopmentFIP#MSBAIf 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 26, 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 $107,900.00 - $195,050.00The 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.SummaryLocation: Chantilly, VAType: Full time