Key Responsibilities: Install, configure, and maintain MySQL, PostgreSQL, Oracle, Microsoft SQL Server, and MongoDB databases across development, staging, and production environments. Implement High Availability (HA) and Disaster Recovery (DR) solutions using technologies such as MySQL InnoDB Cluster, Group Replication, Oracle Data Guard, PostgreSQL Patroni or EFM, and SQL Server Always On. Manage and support cloud-hosted databases such as AWS RDS, Azure SQL Database, Oracle Cloud Database, or Google Cloud SQL. Perform database backup and recovery, ensuring zero data loss and minimal downtime (RPO/RTO objectives). Optimize database performance using query tuning, indexing strategies, memory optimization, and workload balancing. Manage transactional and analytical workloads (OLTP and OLAP) efficiently across distributed and hybrid environments. Participate in database migrations and data unification projects (e.g., MSSQL → MySQL, MariaDB → MySQL). Work closely with application and infra...