Senior Software Engineer - Fullstack (USCIS)

About Pluribus Digital

Join us and do work that matters: use your skills to improve how your government serves the public! Pluribus Digital partners with our government customers to design, develop, and deliver useful and impactful digital products. We are a hands-on digital services consultancy – part technologists, part change agents, and all heart.  We employ modern best practices in all that we do as we work to solve problems in public health, financial industry regulation, granting citizenship and asylum, and identity and access management.

About the Role

As a Senior Software Engineer you will design, develop, and deliver high-quality software solutions that align with business goals as part of a broader legacy modernization initiative. This role focuses on full-stack software development across backend and frontend systems, supporting the transition from monolithic architectures to modern, cloud-ready services. You will collaborate closely with technical leads, Agile teams, and product owners to deliver secure, maintainable, and high-quality software in an Agile environment.

What you will do:

Full-Stack Development

• Design, develop, and maintain production-quality backend and frontend components
• Build APIs, business logic, data access layers, and user interfaces
• Implement new features while refactoring legacy functionality
• Write unit, integration, and regression tests to support safe delivery

Legacy Modernization

• Refactor legacy Java applications (e.g., Struts/JBoss) into Spring Boot services
• Support decomposition of monolithic systems into modular services
• Maintain data integrity and backward compatibility during phased modernization
• Diagnose and resolve defects in complex legacy codebases

Backend Engineering

• Develop RESTful APIs using Java and Spring Boot
• Implement data access with Hibernate/JPA
• Support database modernization, schema evolution, and data migration
• Apply consistent logging, error handling, and observability practices

Frontend Engineering

• Build and maintain React applications using TypeScript
• Implement responsive UI behavior and secure backend integration
• Collaborate with UX and backend teams on API contracts and user experience

Security & DevOps Integration

• Implement authentication and authorization using IAM solutions (e.g., Keycloak)
• Apply OAuth 2.0 / OpenID Connect and role-based access control
• Build with CI/CD, containerization, monitoring, and production readiness in mind
• Collaborate with DevOps teams on deployment and operational support

Agile Collaboration

• Participate in sprint planning, refinement, estimation, and retrospectives
• Contribute to code reviews, documentation, and knowledge sharing
• Communicate progress, risks, and technical challenges clearly
• Understand business goals and drivers and translate those into an appropriate technical solution.
• Support the full SDLC—from requirements and estimation through deployment, monitoring, and documentation.
• Continuously learn and apply new tools/techniques to improve performance, automation, and scalability.

What you will bring:

• Ability to obtain and maintain a Public Trust clearance.
• Bachelor’s degree in Computer Science, Engineering, or related field (or equivalent experience)
• 5+ years of professional software development experience as an individual contributor
• Java expertise (most important) with strong hands-on experience in Spring Boot.
• Experience…