System Design

Systems thinking, written with clarity

Real problems solved at scale, decisions made under constraints, and the trade-offs behind them.

001Available
Database

Multi-Tenant Data Isolation Patterns

Strategies for tenant isolation in MongoDB — from shared collections to dedicated clusters.

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002Coming soon
Performance

Bitmap Indexing for Sub-Millisecond Rule Evaluation

Replacing nested loops with bitmap operations to evaluate complex business rules in microseconds.

003Coming soon
Architecture

Event-Driven Architecture at Scale

How we processed 250K+ messages/hour with SQS, dead-letter queues, and idempotent consumers.