SQL PostgreSQL

Expert mastery in SQL and PostgreSQL across architecture, schema design, and production support (Design: 10/10, Support: 10/10). Designing relational schemas, index tuning (B-Tree, GIN, GiST, BRIN), EXPLAIN ANALYZE query plan optimization, connection pooling with PgBouncer, vacuum tuning, table partitioning, backup/replication, and ACID transaction isolation for high-volume financial and enterprise systems.