Over-engineered ToDo app
A production-ready TypeScript/NestJS reference implementation of DDD, Hexagonal Architecture, CQRS, Event Sourcing, and Event-Driven Architecture.
What is Over-engineered ToDo app?
ddd-hexagonal-cqrs-es-eda is a complete, production-like reference implementation that demonstrates how to combine Domain-Driven Design, Hexagonal Architecture, CQRS, Event Sourcing, and Event-Driven Architecture in a TypeScript and NestJS application. It solves the problem of understanding how to practically apply these advanced patterns to build complex, maintainable software systems.
Backend and full-stack developers, software architects, and engineering teams who are designing or refactoring complex applications and want a real-world example of modern architectural patterns.
Developers choose this project because it provides a fully working, well-documented example that bridges the gap between theory and practice, showcasing how these patterns integrate in a single codebase with production-grade tooling like observability and testing.
Overview
Complete working example of using Domain Driven Design (DDD), Hexagonal Architecture, CQRS, Event Sourcing (ES), Event Driven Architecture (EDA), Behaviour Driven Development (BDD) using TypeScript and NestJS. Like what you see? Don't forget to star! ⭐ ^^^
Use Cases
Best For
- Learning how to implement Hexagonal Architecture with Ports and Adapters
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