Sr. Software Engineer TS/SCI Polygraph HANOVER

Leidos LLC; Hanover (MD); On-site; USD 131,000 - 237,000; Full time

Benefits offered by this job

Paid time off

11 holidays

401K with company match

Flexible schedules

Stock purchase plan

Education and training support

Parental paid leave

Job summary

Leidos LLC is seeking a Software Engineer in the National Security Sector's Cyber & Analytics Business Area (CABA). The role focuses on design, development, testing, deployment, and maintenance of a Data Dictionary metadata system built with Java/Spring, RESTful APIs, and a web UI.

You will work independently within an Agile environment, contributing to architecture decisions and full lifecycle delivery. The position requires a TS/SCI clearance with polygraph up front, a Bachelor’s degree in a

Qualifications

• Active TS/SCI clearance with Polygraph up front (no sponsorship)
• Bachelor’s degree in Computer Engineering, Computer Science, or a related technical field
• Total of 12 years of software engineering experience if no bachelor’s degree
• Minimum of eight years of software engineering experience
• Minimum of three years of experience in SIGINT, IA, or IT domains
• Minimum of three 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

Responsibilities

• Develop, maintain, and enhance Java/Spring applications
• Create a web-based UI for metadata specifications and a database for specifications
• Develop RESTful services for programmatic access to specifications
• Design and implement backend services and APIs
• Contribute to system architecture, design, and best practices
• Maintain database schemas and queries and ensure integrations
• Support CI/CD pipelines, deployment activities, and operational readiness
• Collaborate with cross-functional teams and mentors junior engineers

Skills

Java

Spring/Spring Boot

RESTful APIs

SQL

PostgreSQL

Linux

Education

Bachelor’s degree in Computer Engineering or Computer Science

Tools

JIRA

Redmine

Job description

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.

At Leidos, we offer competitive benefits, including 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 much more.

Join us and make a difference in National Security! 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: Pay Range $131,300.00 - $237,350.00

Pay and benefits are fundamental to any career decision. That’s why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

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.