16-Node On-Prem Kubernetes & Private Knowledge Base\n\nLed the production migration from Docker to Kubernetes across 16 on-premise bare-metal nodes with HashiCorp Vault secrets management, Helm, Nginx Ingress, and MariaDB TDE disk encryption.\n\n## Highlights\n- Zero-Downtime Migration: Seamless transition across 16 on-premise enterprise nodes.\n- Enterprise DevSecOps: Integrated HashiCorp Vault, Helm charts, and Prometheus/Loki observability.\n- Graph RAG Knowledge Base: Deployed LightRAG (Neo4j, PostgreSQL) over Vietnamese government documentation preserving 100% data sovereignty.