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 Responsibilities Experience in modernization of legacy applications (new software development)
Strong communication, design, and documentation skills

Comfort and familiarity in maintaining legacy applications

Strong time and workflow management skills

Comfort and familiarity designing and utilizing custom ETL methodology

Knowledge/experience with the development of Cloud formation scripts to generate network and application infrastructure in a repeatable fashion

Ability to write custom scripts to install and configure code in EC2 instances

Comfort 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 Elasticsearch Ability to Implement NodeJS PM2 for application monitoring and resiliency

Utilized SAFe agile techniques to manage workload

Leverage Amazon Web Services Experience creating RESTful APIWillingness to mentor and teach junior developers’ community best practices in a constructive fashion

Work within the parameters of Agile & Scrum methodologies

Ability to methodically think through new and exciting challenges in a collaborative team environment in order to provide technically sound solutions

Required Skills Active TS/SCI with Polygraph Bachelor'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 Services Prior experience reading and developing solutions to customer requirements

Knowledge of Git, Jenkins, or Rundeck Experiencing working in Command Line (RH Linux)
Desired Skills

Experience with Angular is preferred

Certification - Amazon Web Services (AWS)
Understanding and knowledge with Identity and Accessibility development practices

Experience with automation methodologies like Selenium

Experience with containerization and modular development

Familiarity with UI/UX Design Full 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, 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 $ - $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.

Summary

Location:

Chantilly, VAType:
Full time