2 columns

API Design

Principles for building REST APIs that scale with your product over time.

Database Indexing

How B-tree and hash indexes affect query performance in PostgreSQL.

3 columns

Observability

Logs, metrics, and traces as the three pillars of system visibility.

Load Balancing

Round-robin, least-connections, and consistent hashing compared.

Caching Strategies

Write-through, write-behind, and cache-aside patterns with trade-offs.

4 columns

Auth

OAuth 2.0 and OIDC fundamentals.

Queues

When to reach for async messaging.

CDN

Edge caching and cache invalidation.

CI/CD

Pipeline design for fast, safe deploys.