Strong expertise in PostgreSQL Strong expertise in Redis Strong expertise in RabbitMQ Optionally NoSQL databases Experience with high availability, replication, clustering, and sharding Proficiency in SQL, PL/pgSQL, or other procedural languages Knowledge of monitoring and observability tools for databases (Grafana, Prometheus, Zabbix, or equivalent) Experience with automation and CI/CD for database deployment Solid understanding of backup, restore, and disaster recovery