System Design
Jul 10, 202610 min read
Designing a Real-Time Collaborative Whiteboard canvas with WebSockets & Yjs
Conflict-free Replicated Data Types (CRDTs) powering low-latency multi-user canvas state synchronization.
System Design
Production architecture: BullMQ notifications, Collaborative CRDTs, Database Sharding, CQRS Event Sourcing, gRPC, and Istio.
System Design
Jul 9, 20269 min read
CQRS and Event Sourcing: Building Immutable Audit Logs with EventStoreDB
Decoupling Command write paths from Query read projections for 100% auditable financial and enterprise domain state.
System Design
Jul 8, 20269 min read
Designing a Distributed Notification System (Email, SMS, Push) with BullMQ and Redis
Building high-throughput asynchronous job queues handling delayed retries, rate-limiting user notifications, and multi-provider failovers.
System Design
Jul 7, 20267 min read
Post-Mortem: How a 2-Line Config Change Brought Down Our Search Cluster for 42 Minutes
At 14:02 UTC on a Tuesday, our search cluster stopped responding. Here is how an innocent thread pool config change killed node 3.
System Design
Jul 6, 20268 min read
Zero-Downtime Database Migrations: The Expand-Contract Pattern in Production
How to rename database columns and alter schema types on 500-million row Postgres tables without holding table locks.