#Design Patterns

As a single model grows complex, reads and writes start tripping each other up. Here's how CQRS solves that problem — from simple separation to full event sourcing, with TypeScript examples throughout.

Hexagonal Architecture isolates your business logic from the outside world using Ports and Adapters. Learn how to invert dependency direction so your core domain stays untouched regardless of what database, framework, or external service you swap in — with TypeScript examples throughout.

Applying Uncle Bob's Clean Architecture directly to frontend creates unnecessary complexity. Here's a practical, frontend-adapted layering strategy that actually works in production.

React generally favors unidirectional data flow, but sometimes parents need to command children. Learn how to expose specific methods using useImperativeHandle while maintaining encapsulation.

From simple CRUD to an append-only log of immutable events. We dissect Event Sourcing—the architecture behind scalable financial systems. Learn why it pairs perfectly with CQRS, how to handle the versioning of events (Schema Evolution), and the trade-offs involved in complexity versus auditability.

When our service grew, migrating from MongoDB to PostgreSQL became inevitable. But our code was a spaghetti mess of business logic and database queries. I share my journey of adopting Hexagonal Architecture (Ports and Adapters) to decouple the core logic from external tools, turning a nightmare migration into a manageable task.

DDD is not just about entities and repositories. It's a strategic approach to tackling complex software problems. Learn how Ubiquitous Language, Bounded Contexts, and Aggregates can help you model the real world and align your software architecture with business goals. We also explore Event Storming and Strategic Design.

In complex domains, using a single data model for both reading and writing can lead to performance bottlenecks and messy code. Learn how CQRS (Command Query Responsibility Segregation) coupled with Event Sourcing can decouple your architecture, improve scalability, and simplify domain logic.

A deep dive into Robert C. Martin's Clean Architecture. Learn how to decouple your business logic from frameworks, databases, and UI using Entities, Use Cases, and the Dependency Rule. Includes Screaming Architecture and Testing strategies.

Stop cascading failures in distributed systems. Understand the 3 states of a Circuit Breaker, the dangers of infinite retries, and how to implement Bulkheads, Rate Limiters, and Graceful Degradation using Resilience4j and Istio.