Sr. Software Engineer TS/SCI Polygraph HANOVER

Software Engineer – National Security Sector’s (NSS) Cyber & Analytics Business Area (CABA) Leidos has a new and exciting opportunity for a Software Engineer in our National Security Sector’s (NSS) Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. Competitive benefits include Paid Time Off, 11 paid Holidays, 401k with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and more. The Software Engineer will support the design, development, testing, deployment, and maintenance of a Data Dictionary capability that provides metadata specification, storage, and access services. This system includes a Java/Spring-based backend, RESTful APIs, and a web-based user interface. The engineer will work independently to implement features, contribute to architectural decisions, and support full lifecycle software delivery within a collaborative Agile environment. Responsibilities Develop, maintain, and enhance Java/Spring applications supporting: A web-based user interface for creating and managing metadata specifications, including attributes and valid values A database solution for storing specifications RESTful services enabling programmatic access to specifications Design and implement backend services and APIs Contribute to system architecture, technical design, and engineering best practices Develop and maintain database schemas, queries, and integrations Support CI/CD pipelines, deployment activities, and operational readiness Collaborate with cross-functional teams, stakeholders, and system integrators Mentor junior engineers and provide technical guidance Required Qualifications Active TS/SCI clearance with Polygraph up front (no sponsorship available) Bachelor’s degree in Computer Engineering, Computer Science, or a related technical field Four (4) additional years of software engineering experience may be substituted for a bachelor’s degree, for a total of twelve (12) years of experience Minimum of eight (8) years of software engineering experience Minimum of three (3) years of experience in SIGINT, IA, or IT domains Minimum of three (3) years of experience with modern Java and Spring/Spring Boot development Experience developing RESTful APIs and JSON-based web services Strong SQL and relational database experience, including PostgreSQL or equivalent technologies Experience working in Linux development environments Desired Qualifications Java/J2EE application development Spring Framework and Spring Boot PostgreSQL and SQL database design User interface design, development, and testing REST, XML, and JSON web services Linux-based systems Docker and Kubernetes CI/CD pipelines and deployment automation Task tracking and ticketing systems such as JIRA or Redmine Clear, professional communication of technical ideas, status, and issues to both peers and management Pay Range Pay Range $131,300.00 - $237,350.00 Original Posting June 11, 2026 Commitment to Non-Discrimination All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws. #J-18808-Ljbffr