Sr. Java Full-Stack Developer

Job order - J - Permanent Full Time Title

Sr. Java Full-Stack Developer

Software Development/ Engineering

Baltimore, Maryland, United States

CGI Federal is seeking an experienced Senior Java Full Stack Developer to provide end to end ownership of critical internal applications supporting SSA's MDE platform. In this role, you will serve as the primary engineer responsible for the design, development, security, deployment, and sustainment of production systems relied upon by mission stakeholders. This position is ideal for a highly self sufficient technologist comfortable operating across a diverse enterprise ecosystem and contributing to multiple codebases with minimal ramp up time.

This role is located 5 days a week on site at SSA Woodlawn, MD.

• Lead full life cycle development of Spring Boot 3.x applications, including backend services, REST/OpenAPI interfaces, and server rendered UI using Thymeleaf/Mustache, Bootstrap, HTMX, and jQuery.
• Design, optimize, and maintain PostgreSQL database models leveraging JPA/Hibernate, Liquibase/Flyway migrations, and schema/role governance.
• Implement and support authentication and authorization mechanisms such as LDAP/Active Directory, JWT (RS256), OAuth2, and Spring Security.
• Maintain and evolve multi module Maven builds, including integration of internal SSA/MDE libraries and plugin configurations such as Ja Co Co  and Surefire/Failsafe.
• Develop and maintain robust automated test suites using JUnit 5, Mockito, Cucumber/BDD, Selenium, and Parasoft SOAtest (where applicable), including coverage gating.
• Support SSA Jenkins CI/CD pipelines and environment configuration via Spring Cloud Config; troubleshoot and extend Groovy based Jenkins shared library functions.
• Contribute to Python automation tooling and assist with Helm based deployments and Kubernetes/Open Shift operational troubleshooting.
• Collaborate through Git based workflows (Stash/Bitbucket), participate in formal PR reviews, and maintain internal documentation across Confluence and Jira Service Desk.

• Ability to obtain and maintain US Public Trust Clearance
• 10+ years of hands on Java expertise with strong proficiency in Spring Boot 3.x (MVC, Data JPA, Security, Session, LDAP).
• Demonstrated experience with PostgreSQL and JPA/Hibernate.
• Practical background implementing JWT, OAuth2, and LDAP authentication patterns.
• Experience building server rendered UI with Thymeleaf/Mustache and Bootstrap/jQuery/HTMX.
• Strong automated testing discipline (JUnit 5, Mockito, Cucumber, Selenium).
• Skilled in Maven multi module builds, parent POM structures, and advanced plugin configuration.
• Experience using Eclipse IDE and Lombok.
• Working knowledge of Groovy (Jenkins pipelines), Python scripting fundamentals, and familiarity with Helm/Kubernetes/Open Shift.
• Proven ability to independently troubleshoot, sustain, and enhance production systems.
• Solid understanding of CI/CD pipelines, container lifecycle concepts, and modern orchestration approaches.

• Experience integrating and maintaining Parasoft SOAtest (including Maven and DTP reporting).
• Prior work within federal agencies or highly regulated enterprise environments.
• Background authoring Jenkins Groovy shared libraries, authoring Helm charts, or scripting in Python.
• Familiarity with Open Shift deployment models and release governance best practices.
• Exposure to Dev Ops/observability tools (Docker Compose, Grafana, Timescale DB).
• Experience integrating secure, agentic AI capabilities into existing systems while maintaining federal data integrity.

CGI is required by law in some jurisdictions to include a reasonable estimate of the compensation range for this role. The determination of this range includes various factors not limited to skill set, level, experience, relevant training, and licensure and certifications. To support the ability to reward for merit based performance, CGI typically does not hire individuals at or near the top of the range for their role.

Compensation decisions are dependent on the facts and circumstances of each case. A reasonable estimate of the current range…