Engineering Manager / Technical Lead
A topic hub collecting every article tagged Event-Driven Architecture. Use it to explore related posts and follow this theme across the site.
6 articles
A practical tour of Core NATS — how subjects and wildcards route messages, why delivery is at-most-once, and how request/reply and queue groups replace load balancers for many microservice patterns.
How a generic order domain flows from a relational write database through NATS KV and index subjects into OpenSearch and an analytics warehouse — without mistaking plumbing for source of record.
What to monitor on NATS and JetStream, how to wire Prometheus and Grafana alerts, and which application-level SLOs catch projection lag before an SLO breach — using the orders/CDC/indexer pattern from Part 4.
JetStream KV looks like a key-value database, but it is a stream abstraction with a latest-value view — watch for changes, design keys as hierarchies, and treat entity types as key prefixes.
JetStream adds durable streams and consumer delivery state so publishers and subscribers can be temporally decoupled — capture, replay, and redeliver until acknowledged.
An honest comparison of delivery semantics, persistence, ops burden, fan-out, replay, portability, and cost — with symptom-based selection tables instead of benchmark wars.
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