Event-driven messaging architecture routing user requests through Kafka topics for postpaid and prepaid billing workflows. API Gateway forwards requests to be-messaging Service, which publishes to Kafka topics segregated by billing type—Postpaid and Prepaid—with downstream processors handling marketing, authentication, and agent-flow domains. Each billing processor (billing-marketing, billing-authentication, billing-agent-flow) republishes to dedicated message topics consumed by specialized processors that persist to Database, cache in Redis, and integrate with 3rd Party Services. Fork this diagram on Diagrams.so to customize topic partitioning, add dead-letter queues, or adapt for your telecom billing domain.