Java Engineer – Application / Database Modernization

Participate in the migration project from Oracle to PostgreSQL as a Software Engineer with proficiency in Java, Spring, and Hibernate. Analyze and remediate large enterprise Java codebases to replace legacy or database-specific SQL constructs with modern, standards-compliant SQL. Convert embedded SQL within Java services and MyBatis XML mappers, including rewriting constructs such as vendor-specific functions, sequences, pagination logic, dynamic SQL, and error-handling patterns. Collaborate closely with schema and database migration engineers to ensure application-layer SQL aligns with the modernized target schema. Refactor Java transaction logic, error-handling, drivers, and ORM/DAO layers to support the behavior of modern databases. Participate in unit, integration, and performance testing to confirm functional parity and ensure applications meet performance SLAs post-modernization. Support application cutover activities for production environments, including validation, monitoring setup, rollback planning, and stabilization. Produce engineering documentation: SQL remediation guides, code-migration runbooks, troubleshooting guides, and knowledge-transfer material for customer teams. Work across distributed teams (US & India) and collaborate with customer SMEs to ensure business logic alignment and successful modernization outcomes.