Senior Software Developer
At a glance
Senior Software Engineering role at Leidos. Chantilly · full-time · $107,900–$195,050 base.
techroles summary, based on the employer's posting.
What you'll do
- Build Java or Python software that uses LLM APIs to turn varied data and access policies into a consistent format for compliance checks
- Work with product owners and business analysts to turn customer needs into technical designs and scalable, testable software
- Plan incremental delivery in Scrum, refine the Jira backlog, and help improve application performance with the team
- Take a rotating after-hours support shift, roughly one week every three months
What you bring
- You hold an active TS/SCI clearance with polygraph
- You bring a bachelor's degree and at least eight years of relevant experience, or equivalent additional experience instead of the degree
- You have built REST APIs, used AWS, and written scripts to install and configure software on EC2
- You have applied Scrum and can design system architectures and new features
Who this fits
This senior development role suits someone who can work across software design, implementation, and iterative delivery. It is based in Chantilly and requires an active TS/SCI clearance with polygraph. You will share after-hours on-call coverage, roughly one week every three months.
From the employer
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 Developer will work with a large team of developers, software engineers, and data engineers.
The Developer will be part of a team of developers that are building a new application that utilizes LLM to convert data and access policies from a variety of sources and formats into a uniform format for compliance assessment. The Developer works closely with product owners, business analysts, and other teams to translate business requirements into technical solutions. The Developer will analyze and decompose complex software systems and create designs for scalability, testability, and performance. Our work rhythm revolves around the Scrum agile framework to deliver incremental enhancements on a 2-week cycle. Developers actively participate in planning deliverables and grooming the Jira backlog. We rely on team collaboration to continually fine tune performance and ensure clear communication. Developers also participate in a team rotation of O&M responsibilities: They are required to be on-call for after-hours support approximately one week every three months.
Required Qualifications:
- Active TS/SCI with Polygraph
- BS degree and 8+ years of relevant experience. Additional experience in lieu of degree.
- Develop Java and/or Python applications that leverages Large Language Model (LLM) API calls
- Utilized Scrum agile techniques to manage workload and incrementally build out applications to meet customer requirements
- Leverage Amazon Web Services
- Experience creating RESTful API
- Ability to write custom scripts to install and configure code in EC2 instances
- Experience with defining system architectures and design of new features
- Knowledge of Git, Jenkins, or Rundeck
Desired Qualifications:
- Exposure to foundation AI models such as GPT
- Familiarity with AI topics and concepts such as prompt engineering
- Experience with AI libraries such as LangChain or others
- Experience with DynamoDB, PostgreSQL, and other relational or NoSQL database platforms.
- Understanding of Identity Access Management (IAM) Concepts
- Experience with design patterns and best practices
- Experience building microservices
- Experience with integration testing frameworks
- Documented open-source contributions, technical certifications, continued ed
FIP
#MSBA
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:
October 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 $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.
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