Senior Full Stack Developer

Unissant, Inc. delivers innovative capabilities to the agencies that keep our nation healthy and safe. We apply our domain expertise, data acumen, and technology know-how to achieve breakthrough results for our clients. Working collaboratively, we advance missions and careers through a focus on honesty, integrity, and dependability. We continuously look for talent, excited to join that effort. To learn more about our exciting organization, please visit us at www.unissant.com.

We are seeking a Senior Full Stack Developer to join our team in supporting modernization initiatives for our DHS, Custom and Border Protection client with expertise in Java (Spring Boot, JPA, Liquibase), Angular, and databases (RDS, PostgreSQL). The ideal candidate excels in building scalable microservices, containerized deployments, and CI/CD automation using GitOps.

Qualified applicants may be subject to a security investigation and must meet minimum qualifications for access to classified information. This is a highly technical position; individuals will be screened by peers in a technical review of skills and experience.

*This position is contingent upon contract award.

Essential Duties and Responsibilities:

• Design and develop high-quality web applications using Spring Boot, JPA, Liquibase, and Angular as core frameworks.
• Architect, implement, and maintain robust RESTful APIs and microservices supporting business-critical workflows.
• Develop, test, and optimize scalable database solutions using Relational Database Service (RDS) and PostgreSQL.
• Apply OWASP secure coding practices and test-driven development (TDD) principles to deliver high-quality, maintainable code; write automated tests for all new features.
• Leverage Docker to containerize application components, ensuring consistency across development, test, and production environments.
• Automate deployments with CI/CD pipelines integrated via GitOps tools.
• Collaborate closely with cross-functional teams including Product Managers, DevSecOps Engineers, and Business Leads to deliver end-to-end features.
• Participate in code reviews, mentor junior developers, and support knowledge sharing across the team.
• Troubleshoot, debug, and resolve complex defects across the application stack.
• Ensure secure design and compliance with best practices for access control and data protection.
• Support legacy JEE software applications on WebSphere.
• Present the solution at formal and informal design reviews and document the design according to the Government's system lifecycle methodology.

Work Experience & Job Skills:

• Minimum 8+ years of hands-on development experience using Java, Spring boot Microservices, JPA and Angular 14+
• Experience with modern software engineering tools and methodologies including Eclipse, Spring Tool Suite (STS), Visual Studio Code, and Atlassian Products (Jira, Confluence).
• Proficiency in building and querying RDS databases, especially PostgreSQL.
• Experienced in test driven development (TDD), with the ability to write and maintain unit, integration, and end-to-end tests.
• Strong understanding of microservice architecture and associated design patterns.
• Proven experience with containerization (Docker) for deploying and managing scalable applications.
• Hands-on expertise in CI/CD automation, using GitOps tools for deployment orchestration (e.g., ArgoCD, GitHub Actions).
• Proficient with version control systems (Git) and Agile software development practices.
• Working experience on Web services (SOAP and Restful) and JEE Server experience (WebLogic, WebSphere etc.).
• Experience with Unix/Linux.

Education:

• Bachelor's degree in Computer Science, Software Engineering, Information Technology, or related field with applicable experience is required. Applicable work experience may be considered in lieu of a degree.