Software Engineer (CMS-HIOS)

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 Software Engineer, you will design, develop, maintain, and enhance software supporting the Centers for Medicare & Medicaid Services (CMS) Health Insurance Oversight System (HIOS). Working within an Agile team, you will develop secure, high-quality software while supporting the ongoing operations and maintenance of a large federal enterprise application used by CMS, state regulators, and health insurance issuers. This role contributes to the continued evolution of HIOS through defect resolution, technical debt reduction, annual regulatory updates, small enhancements, and continuous improvement initiatives while helping ensure system stability, security, and operational excellence. What you will do: Application Development & Maintenance Design, develop, maintain, and enhance backend services and frontend applications supporting multiple HIOS modules. Develop new functionality while maintaining existing enterprise applications. Troubleshoot, analyze, and resolve software defects across integrated applications. Refactor existing code to improve maintainability, performance, and long-term sustainability. Support annual plan year updates and implementation of evolving CMS business requirements. Backend Development Develop and maintain Java applications using the Spring Framework. Build and consume RESTful APIs supporting internal and external system integrations. Develop business logic, data access components, and batch processing capabilities. Build applications using Maven and established enterprise development standards. Support Oracle and PostgreSQL databases through application development, SQL optimization, and troubleshooting. Frontend Development Develop and maintain user interfaces using Angular. Support existing JSP-based applications while contributing to incremental UI improvements. Collaborate with UX, Product Owners, and backend engineers to deliver intuitive, accessible user experiences. Integrate frontend applications with secure backend services and enterprise authentication. Enterprise Integration & Operations Develop and maintain REST APIs, batch processes, secure file transfers, and enterprise integrations supporting CMS systems, HealthCare.gov , state marketplaces, insurance issuers, and other external partners. Develop SQL queries, support reporting and scheduled data exports, and maintain Oracle and PostgreSQL database integrations. Support enterprise authentication and authorization through the CMS Enterprise Portal, Identity Management (IDM), MFA, role-based access, and centralized user provisioning. Participate in release planning, deployment activities, regression testing across multiple application modules, production support, and continuous improvement initiatives focused on application stability, defect resolution, and technical debt reduction. Cloud & DevSecOps Develop and support applications hosted in AWS using services such as EC2, ECS, S3, CloudWatch, and IAM. Contribute to CI/CD pipelines utilizing GitHub Actions, Jenkins, SonarQube, Nexus, and modern software engineering practices. Collaborate with DevOps and infrastructure teams to deliver secure, reliable, and maintainable software throughout the software development lifecycle. Agile Collaboration Participate in sprint planning, backlog refinement, estimation, sprint reviews, and retrospectives. Perform peer code reviews and contribute to engineering best practices. Produce technical…