2025 in Posts: From Clean Architecture to the AI Revolution.

Architecture Patterns in Microservices: Consumer-Driven Contract Testing

It’s the undisputed number one of the year—and it makes sense. Touching an API and accidentally breaking three services that depended on it happens more often than we’d like. In this post, we explain how to use “contracts” so your APIs can evolve safely, with the confidence that everything will continue fitting together. We walk you through how to keep stability in your deployments.

Deep Learning about Spring AI: getting started

AI is no longer exclusive to data scientists. With the arrival of Spring AI, integrating models like ChatGPT or Gemini into Java applications is now almost as easy as adding a dependency to your project. We explain how to configure the ChatClient and how to use Ollama to run your own LLMs locally without headaches.

Anemic Model Antipattern: Back to Our Object-Oriented Roots

Sometimes you have to go back to the basics to move forward. We’ve seen many domain classes end up as simple bags of getters and setters, commonly known as the “Anemic Domain Model” anti-pattern. In this post, using a real example, we show you how to enrich your domain to clean up your services and avoid unnecessary duplication.

SQL vs NoSQL? A Practical Guide to Choosing the Best Database for Your Project

The eternal debate that never goes out of style. In this guide, we don’t just scratch the surface: we break down when to prioritize ACID consistency and when to embrace the flexibility of the CAP Theorem. Whether document, key-value, or graph, here’s the definitive guide to choosing the database your project truly needs.

Dependency Injection with Koin

If you code in Kotlin and you're tired of Dagger or Hilt’s endless boilerplate, this post is for you. We explain why Koin has become a favorite for many developers: it’s lightweight, pragmatic, and uses a DSL that finally makes dependency injection in Android simple, fast, and easy to test.