Engineer managed database observability across AWS RDS/Aurora (MySQL, PostgreSQL, SQL Server, Oracle), Azure SQL/PostgreSQL/MySQL, and NoSQL/cache services (DynamoDB, Cosmos DB, ElastiCache/Redis), including query-level performance analytics, slow-query and execution-plan capture, lock/deadlock/wait analysis, connection pool and session monitoring, replication lag, storage/IOPS saturation, and backup/HA health -- correlating database spans with upstream APM traces. This role is hands-on: instruments services with distributed tracing, code-level profiling, and custom metrics; builds and tunes Datadog (or comparable) dashboards, alerts, APM, log pipelines, RUM, and synthetic monitors; then uses that telemetry to solve production performance, reliability, and capacity problems.