Principal Software Engineer

Leidos has a new and exciting opportunity for a Principal Software Engineer in our Intelligence Sector's, 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! Are you passionate about modern software engineering and building enterprise applications with today's leading technologies? Leidos is seeking an experienced Software Engineer to join an Agile development team responsible for modernizing and enhancing a mission-critical enterprise application. This is an exciting opportunity to help transform a traditional Java application into a modern architecture utilizing Spring Boot, Angular, Docker, Kubernetes, RESTful APIs, relational databases, and modern DevSecOps practices. You'll work on challenging technical problems while contributing to architectural decisions, improving system performance, and helping shape the future of a critical enterprise system. If you enjoy modernizing existing applications, learning new technologies, and collaborating with highly skilled engineers in an Agile environment, we'd like to hear from you. Primary Responsibilities Analyze user and system requirements to design, develop, test, and maintain Java and Angular applications. Design, develop, and support RESTful APIs, service integrations, and data access components for Oracle, PostgreSQL, and other relational databases. Support application modernization initiatives, including Spring Boot migration, database modernization, microservices, and containerization. Deploy and support containerized applications in Kubernetes environments across cloud and on-premises infrastructure. Participate in architecture reviews, code reviews, troubleshooting, technical design, and continuous process improvement. Develop automated unit and integration tests, support CI/CD pipelines, and maintain technical documentation using Confluence and Jira. Provide backup database administration support for Oracle, PostgreSQL, and MariaDB while cross-training across application, database, and deployment technologies to ensure operational continuity. Basic Qualifications Bachelor's degree in Computer Science or a related discipline from an accredited college or university. Minimum of 14 years of software engineering experience on programs and contracts of similar scope, type, and complexity. Security Clearance Requirement Active TS/SCI with polygraph Preferred Qualifications Experience developing Java enterprise applications using Spring Boot (or similar frameworks) and Angular (or comparable front-end technologies). Experience designing and implementing RESTful APIs and integrating applications with Oracle, PostgreSQL, MariaDB, or other relational databases. Experience with application modernization, including Spring Boot migrations, microservices, and database modernization initiatives. Experience developing, deploying, and supporting containerized applications using Docker, Podman, and Kubernetes platforms (e.g., Rancher, Amazon EKS, OpenShift). Familiarity with Kubernetes concepts including Deployments, Services, ConfigMaps, Secrets, Ingress, Persistent Volumes, Helm charts, and cloud-native architectures. Experience implementing GitLab CI/CD pipelines, automated testing, DevSecOps practices, and modern software delivery processes. Experience using Jira and Confluence in Agile environments, providing database operational support, and working with XML, JSON, or other structured data formats. Why Join Leidos? Work on a mission-critical enterprise application supporting National Security. Help modernize a production Java platform using Spring Boot, Angular, Docker, and Kubernetes. Contribute to architecture discussions and technical design decisions that shape the future of the application. Expand your expertise across software engineering, containerization, relational databases, CI/CD, and cloud-native technologies. Collaborate with an experienced Agile development team solving complex technical challenges using modern software engineering practices. CONMD KQW 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 2, 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 $154,050.00 - $278,475.00 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. 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 Pay and Benefits 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. 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 View email address on click.appcast.io. 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. #J-18808-Ljbffr