Simpusaka is a production-grade microservices data platform combining OLTP transactional services with OLAP analytics via event-driven ETL. Client requests flow through NGINX and Kong API Gateway to gRPC microservices (User, Laporan, Kasus, Activity) backed by per-service PostgreSQL databases, while Kafka streams events to Airflow-orchestrated dbt transformations in ClickHouse. The architecture separates operational data (Bronze/Silver layers) from analytics-ready data marts (Gold layer), with Redis caching and public APIs serving read-only access to React/Next.js frontends and Metabase dashboards. This design demonstrates the modern medallion architecture pattern, enabling real-time transactional processing alongside batch analytics without coupling operational and analytical workloads. Fork and customize this diagram on Diagrams.so to adapt the topology for your microservices stack, adjust Kafka topics, or swap ClickHouse for Snowflake or BigQuery.