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This skill covers the ability to design, develop, maintain, and support enterprise Java applications operating in an Oracle-based environment , including Web user interfaces developed with Oracle tools , with long-term on-site support in Munich, Bavaria (Germany) . 1. Java Enterprise Development Development of applications using Java SE / Java EE (Jakarta EE) Implementation of Servlets, JSP, JSF , and Oracle-oriented frameworks Management of the HTTP request/response lifecycle Design and implementation of RESTful Web Services (JAX-RS) and, where required, SOAP services Session handling, authentication, authorization, and application-level security 2. Oracle Environment Proven experience within the Oracle ecosystem, including: Oracle Database (SQL, PL/SQL, stored procedures, packages) JDBC connectivity and connection pooling Transaction control and query performance tuning Deployment and configuration on Oracle WebLogic Server : Application deployment and lifecycle management Configuration of datasources, JMS resources, and security realms Operational support across DEV, TEST, and PROD environments 3. Request / Response Architecture Design and maintenance of multi-tier architectures : Web Frontend → Application Server → Oracle Database Enforcement of separation of concerns: Presentation layer Business logic layer Data access layer (DAO / Repository patterns) Error handling, exception management, and HTTP response management Logging, monitoring, and performance tracing 4. Web Interface Development with Oracle Tools Development of Web interfaces using: Oracle ADF (Application Development Framework) JSF with Oracle UI components Frontend–backend data binding and state management Implementation of forms, validations, navigation flows, and workflow logic Integration of frontend components with backend services through synchronous requests 5. On-Site Activities in Bavaria (Germany) The role includes full or partial on-site presence in Bavaria, Germany , for an estimated duration of approximately 24 months , with activities such as: Direct collaboration with local development, operations, and business teams Participation in on-site technical workshops, design sessions, and sprint planning Support during application rollout, stabilization, and production go-live phases Troubleshooting of production incidents requiring physical presence Knowledge transfer, technical coaching, and documentation for local teams Coordination with German stakeholders to align functional requirements and technical solutions Compliance with local IT, security, and operational procedures 6. Application Support and Maintenance Diagnosis and resolution of application issues and defects Support for: Functional enhancements Code refactoring Java, Oracle Database, and WebLogic version upgrades Performance analysis and system optimization Contribution to technical and operational documentation 7. Tools and Development Practices IDEs: Oracle JDeveloper , Eclipse, IntelliJ IDEA Version control systems (Git, SVN) Build and deployment tools (Maven, Ant) Unit and integration testing (JUnit and related frameworks) Close cooperation with DBAs, system administrators, QA teams, and functional analysts