Senior Java Full-Stack Engineer (Onsite Baltimore)

CGI Njoyn; Milford Mill (MD); On-site; USD 90,000 - 194,000; Full time

Benefits offered by this job

Competitive compensation

Comprehensive insurance options

Matching contributions through the 401

Paid time off

Paid parental leave

Tuition assistance

Wellness programs

Job summary

CGI Federal is seeking a Senior Java Full Stack Developer to own end-to-end development of critical SSA MDE platform applications. In this role, you will design, develop, secure, deploy, and sustain production systems relied upon by mission stakeholders. This position is located 5 days a week on site at SSA Woodlawn, MD.

You will lead full lifecycle development, work with Spring Boot 3.x, PostgreSQL, and modern DevOps practices, and collaborate across multiple codebases with minimal ramp up time.

Qualifications

• 10+ years of hands on Java expertise with strong proficiency in Spring Boot 3.x and related technologies.
• 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/OpenShift.
• Proven ability to independently troubleshoot, sustain, and enhance production systems.
• Solid understanding of CI/CD pipelines, container lifecycle concepts, and modern orchestration approaches.

Responsibilities

• 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 JaCoCo 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/OpenShift operational troubleshooting.
• Collaborate through Git based workflows (Stash/Bitbucket), participate in formal PR reviews, and maintain internal documentation across Confluence and Jira Service Desk.

Skills

Java

Spring Boot

JPA/Hibernate

PostgreSQL

REST/OpenAPI

LDAP/AD

JWT/OAuth2

JUnit 5

Maven

Jenkins

Git

Thymeleaf/Mustache

Tools

Eclipse IDE

Lombok

Liquibase/Flyway

Git

Job description

CGI Federal is seeking a Senior Java Full Stack Developer to own end-to-end development of critical SSA MDE platform applications. In this role, you will design, develop, secure, deploy, and sustain production systems relied upon by mission stakeholders. This position is located 5 days a week on site at SSA Woodlawn, MD.

You will lead full lifecycle development, work with Spring Boot 3.x, PostgreSQL, and modern DevOps practices, and collaborate across multiple codebases with minimal ramp up time.