Scaling Kafka Consumers: Proxy vs. Client Library for High-Throughput Architectures

Apache Kafka is a powerful foundation for event-driven architectures. It enables true decoupling between producers and consumers. A single event can be consumed by multiple services, each evolving independently. The pull-based consumption model in Kafka is a key enabler of this flexibility, giving consumers full control over how and when to process data. This architecture works well in most deployments. In fact, in many real-world scenarios, having multiple independent consumers per Kafka topic is the right pattern. It aligns with microservices best practices and supports autonomous teams building independent applications leveraging domain-driven design (DDD).