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.
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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.
Cloud Computing
Jul 5, 20269 min read
Zero Trust Cloud Security: Enforcing WireGuard & Tailscale Mesh Networks for Microservices
Eliminating public IP exposure and bastion hosts using kernel-level WireGuard encryption and Tailscale ACL policies.
Cloud Computing
Jul 4, 20268 min read
Kubernetes Pod Lifecycle & Graceful Shutdown: Handling SIGTERM vs SIGKILL
Preventing dropped HTTP connections during rolling k8s deployments by configuring terminationGracePeriodSeconds and preStop hooks.