Sr. Java Software Engneer

Leidos•San Diego, CA

1d•Onsite

About The Position

Leidos is hiring a Sr. Java Software Engineer for its INTEL Sector Cyber & Analytics Business Area in Point Loma, San Diego, California. The role supports mission-focused software for national security and involves designing, developing, integrating, testing, and sustaining software. Depending on program needs and experience, work may focus on Java backend services, system integration, databases, secure communications, or full-stack web development. The position is performed onsite and follows a 9/80 schedule, with every other Friday off. The engineer will build and maintain web applications, including web services, full-stack components, and persistence layers, while working in an Agile Scrum environment with engineers, information assurance and quality assurance staff, and customer representatives. The role applies clean coding practices and S.O.L.I.D. principles to deliver maintainable, secure, and reliable software. It also includes leading complex technical efforts, influencing architecture and engineering practices, mentoring teammates, identifying and managing technical risks, and sustaining high standards for quality, security, testing, and maintainability.

Requirements

Bachelor's degree in Computer Science or a relevant field and 8–12 years of relevant professional experience.
Active Secret security clearance.
Knowledge of Git or other configuration-management tools.
Familiarity with Spring Framework, Spring Boot, or comparable application-development frameworks.
Interest in cybersecurity protocols and secure communications.
Experience with Scrum or another Agile environment, such as SAFe or XP.
Ability to work well on a team, with excellent written and communication skills.
DoD 8570-approved security certification, such as Security+, required within 90 days after hire.

Nice To Haves

Knowledge of Java Swing GUI.
Knowledge of networking and communication protocols such as TLS handshake and HTTPS.
Experience with Maven.
Experience with web technologies such as HTML, CSS, and JavaScript.
Experience with web service architectures such as REST, SOAP, and AWS.
Experience with software configuration management, such as Git and GitHub.
Experience with continuous integration, quality, and DevOps concepts, tools, or technologies such as Ant, Maven, Jenkins, SonarQube, FishEye, Crucible, Gradle, and JUnit.
Experience with build scripts such as Maven and Ant.
Experience with Agile management tools and concepts such as VersionOne, JIRA, and Rally.
Experience configuring web servers such as JBoss, WildFly, and Tomcat.
Experience with database development using PostgreSQL, SQL Server, MySQL, SQLite, or Oracle.
Experience in AWS, Azure, or hybrid cloud environments.
Experience with containerized or distributed applications such as Kubernetes, and/or infrastructure automation tools such as Ansible and Terraform.
Experience with AI, LLM, or agent-assisted development tools such as OpenCode, Pi, Herdr, and Beads.

Responsibilities

Develop and maintain Java-based backend services, APIs, integrations, and persistence-layer components.
Develop and maintain full-stack web applications, including user-interface components and web services.
Translate user stories, acceptance criteria, system engineering artifacts, and technical requirements into maintainable, secure, and testable software.
Apply secure software-development principles, clean-code practices, automated testing, and established configuration-management processes.
Support software integration, troubleshooting, defect resolution, and deployment across development, integration, test, and operational environments.
Participate in Agile ceremonies, including sprint planning, backlog refinement, reviews, retrospectives, and technical discussions.
Collaborate with teammates to maintain high standards of engineering rigor, code quality, test coverage, documentation, and delivery discipline.
Use approved development, build, continuous integration, test automation, and code-quality tools to support reliable software delivery.
Support development, integration, and deployment across on-premises, cloud-hosted, and containerized hybrid environments, collaborating with infrastructure and cybersecurity teams as needed.
Lead complex technical efforts, influence architecture and engineering practices, mentor teammates, identify and manage technical risks, and help sustain high standards for quality, security, testing, and maintainability.