Java Developer​/OneStream, Associate; Part Time - Regular

Job Description:

Job Title:

Java Developer / One Stream, Associate (Part Time - Regular)

Location:

Rockville, MD Work Type:
Hybrid Work ( 1 day onsite minimum – no exceptions) Position:
Part Time (20 hours per week) Sponsorship:
No sponsorship assistance is available for this position now or in the future. Clearance:
Ability to Obtain Public Trust

Design, develop, test, maintain, and enhance Java-based enterprise applications supporting NIH business operations. Develop scalable backend services using Java 11+ (or higher), Spring Boot, and modern software engineering practices. Modernize legacy applications by migrating business functionality into maintainable Java architectures. Participate throughout the SDLC including analysis, design, development, testing, deployment, production support, and continuous improvement. Develop reusable application components and shared libraries to improve maintainability and reduce technical debt.

Participate in application architecture discussions and contribute to technical solution designs aligned with enterprise standards. Collaborate with Enterprise Architecture, Database Administrators, Dev Sec Ops , and IT Security teams to ensure solutions meet security, scalability, and performance requirements. Translate business requirements into technical specifications, user stories, and implementation plans. Support technical design documentation and architecture artifacts throughout project delivery.

Design and develop RESTful APIs and backend services supporting enterprise applications. Integrate Java applications with databases, cloud services, third-party platforms, and internal enterprise systems. Develop and maintain Java integration services connecting enterprise applications with financial, budgeting, reporting, HR, and other enterprise business platforms. Design and implement secure RESTful APIs and integration services supporting enterprise platforms such as One Stream, ERP systems, HR applications, Service Now, Salesforce, or other enterprise business systems where applicable.

Develop middleware, microservices, and data synchronization services that exchange information between Java applications and enterprise platforms using REST APIs, SOAP services, JSON/XML, messaging technologies, scheduled batch processing, or ETL frameworks. Troubleshoot, optimize, and maintain enterprise integrations to ensure high availability, performance, scalability, and data integrity across connected business applications. Develop efficient SQL queries, stored procedures, and data access layers using JPA/Hibernate.

Support secure authentication and authorization mechanisms for enterprise applications.

Support automated CI/CD pipelines using Jenkins, Git Hub Actions, Git Lab CI, or similar Dev Ops platforms. Utilize Git for source code management, branching strategies, code reviews, and release management. Follow enterprise configuration management, change management, and release governance processes. Collaborate with Dev Ops engineers to automate deployments and improve software delivery efficiency.

Develop unit tests, integration tests, and participate in regression and performance testing activities. Support User Acceptance Testing (UAT) and defect resolution throughout release cycles. Participate in peer code reviews to maintain coding standards and software quality. Maintain technical documentation, design documentation, API documentation, and operational support guides. Support knowledge transfer and documentation for production support teams.

Develop applications following secure coding practices and federal cybersecurity requirements. Collaborate with IT Security teams to remediate vulnerabilities identified through code scanning and security assessments. Support RMF documentation, vulnerability remediation, and ATO readiness activities where applicable. Ensure applications comply with organizational security policies and data protection requirements.

Support application deployments and post-production validation activities. Troubleshoot application defects, production issues, and performance bottlenecks.…