Senior Java Developer Jobs in Greenbelt, MD (NOW HIRING)

Zachary Piper Solutions is seeking an experienced Senior Java Developer to support the modernization of a mission-critical government information system. This role will lead enterprise application modernization efforts, technology stack upgrades, and complex system integrations supporting secure government environments. The ideal candidate brings deep expertise in enterprise Java development, Apache Solr, application modernization, and secure software engineering within highly regulated environments. This is a Hybrid role (1-2 days remote), and candidates must be able to work on-site in either Annapolis Junction, MD, Washington D.C., or Reston, VA. Responsibilities of the Sr. Java Developer: * Lead the modernization, enhancement, and maintenance of enterprise Java and Python applications, including planning and executing technology stack upgrades, refactoring legacy code, implementing secure coding practices, and recommending improvements for application performance, scalability, and maintainability.
* Administer, upgrade, and optimize enterprise application infrastructure, including Apache Solr (clustering, Zookeeper, version upgrades, index migration, and optimization), Apache Tomcat deployments, Oracle 19c database integrations, Apache Directory Studio integrations, SAP Business Intelligence reporting frameworks, and Windows-based VMware environments.
* Troubleshoot and resolve complex application, database, middleware, and infrastructure issues while supporting testing, validation, deployment, and production operations across multiple environments.
* Collaborate with security, infrastructure, database, and business stakeholders to successfully deliver modernization initiatives, coordinate upgrades with minimal operational impact, participate in code reviews, promote development best practices, and maintain technical documentation, architecture diagrams, deployment procedures, and system configurations. Qualifications for the Sr. Java Developer: * 13+ years of experience in software development, systems engineering, information technology, or a related technical field with comparable responsibilities.
* Bachelor's degree may substitute for 4 years of experience; Master's degree may substitute for 6 years of experience.
* Expert-level experience developing enterprise Java applications with strong Python development experience.
* Experience developing and supporting applications on Windows-based VMware infrastructure.
* Deep expertise with Apache Solr and Zookeeper, including Solr administration, clustering, version upgrades, index migration, and optimization.
* Experience administering Apache Tomcat, integrating applications with Oracle 19c and relational databases, supporting Apache Directory Studio integrations, and maintaining SAP Business Intelligence reporting frameworks.
* Strong knowledge of secure software development practices, government security compliance requirements, troubleshooting, analytical problem-solving, and technical communication.
* Active Top Secret (w/ SCI eligibility) clearance, (active TS/SCI with CI Poly preferred).
* Desired * Experience with PrimeFaces, DevSecOps practices, automated deployment pipelines, and large-scale government modernization initiatives within classified or highly regulated environments. Compensation for the Sr. Java Developer: * Salary Range: $$150,000 - $210,000 *depending on experience* * Comprehensive Benefits: Cigna Medical, Dental, Vision, 401k Plan, PTO, Holidays, Sick Leave if required by law This job opens for applications on 07/21. Applications for this job will be accepted for at least 30 days from the posting date. #LI-MS1 #LI-HYBRID Keywords: Java, J2EE, Enterprise Java, Python, Software Development, Application Development, Application Modernization, Legacy Modernization, Secure Software Development, Secure Coding, Enterprise Applications, Systems Engineering, Windows Server, Windows-based VMware, VMware, Apache Solr, SolrCloud, Solr Administration, Solr Clustering, Solr Index Migration, Solr Optimization, Solr Upgrades, Apache Zookeeper, Apache Tomcat, Tomcat Administration, Apache Directory Studio, LDAP, Directory Services, Oracle 19c, Oracle Database, SQL, Relational Databases, SAP Business Intelligence, SAP BI, Business Intelligence Reporting, Enterprise Integration, Middleware, System Integration, Performance Optimization, Scalability, Troubleshooting, Root Cause Analysis, Software Upgrades, Technology Stack Upgrades, Code Refactoring, Application Deployment, Configuration Management, Production Support, Testing, Validation, Code Reviews, Technical Documentation, System Architecture, Deployment Procedures, Government Systems, Federal Programs, Classified Environment, DevSecOps, CI/CD, PrimeFaces, TS/SCI, CI Poly, Polygraph