Database admin

Proven hands-on experience administering and managing enterprise database platforms including Oracle Sybase ASE Microsoft SQL Server PostgreSQL DataStax Cassandra and Couchbase covering installation configuration patching upgrades and ongoing maintenance.
Strong understanding of database architectures and core concepts across RDBMS and NoSQL systems including tablespaces datafiles filegroups schemas ASM Cassandra keyspaces Couchbase buckets indexing strategies query optimization and transaction/log management.
Extensive experience in database performance tuning and monitoring utilizing tools such as:
Oracle (AWR ADDM ASH)
SQL Server (Query Store Profiler)
PostgreSQL (EXPLAIN ANALYZE)
Cassandra and Couchbase monitoring utilities
Execution plan analysis and SQL/query optimization across platforms
Strong expertise in backup and recovery solutions including:
Oracle RMAN (full/incremental archive log management)
SQL Server native backup/restore
PostgreSQL logical/physical backups (pgdump WAL archiving)
Cassandra snapshots and replication strategies
Couchbase backup and restore tools
In-depth knowledge of high availability and replication technologies including:
Oracle RAC Data Guard GoldenGate
SQL Server Always On Availability Groups Log Shipping
PostgreSQL streaming and logical replication
Cassandra distributed clustering and replication
Couchbase Cross Data Center Replication (XDCR)
Experience integrating databases with enterprise applications and identity systems including LDAP/Active Directory for secure authentication and role-based access control.
Proven ability to manage databases in highly available scalable and hybrid environments (on-premises and cloud platforms such as OCI AWS Azure) ensuring resilience and optimal performance.