Event-Driven-Architecture

Design an event-sourced platform that stores immutable, append-only domain events as the system of record, scales to high write throughput, and serves low-latency reads via CQRS projections with reliable pub/sub distribution.

Design a horizontally scalable architecture by making compute stateless, partitioning stateful stores, and decoupling workloads with queues/streams. Focuses on hot partitions, fanout, caching, and consistency trade-offs while targeting low latency and 99.99% availability.

Storing application state as a sequence of immutable events for auditability and rebuilding state