Laravel & Design Patterns — Practice Series: Adapter
Welcome back. This is the next article in our practical use of patterns in Laravel, and in this guide, we are going to talk about one of the most po…
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The State Pattern Trap: Why GoF Is Not Always the Best Choice
Have you ever tried to use the classic Gang of Four (GoF) State Pattern in real code? You might have hit a wall. You might have thought, "Wait, this…
The Criteria pattern in NestJS: what a client may ask for is a file, not a signature
The Criteria pattern in NestJS One single way to filter, sort and paginate any list. Five parameters and a find() The example running through this a…
The Boundary Independence Principle (BIP)
The Boundary Independence Principle (BIP) I've been writing about the SOLID principles for over a decade. I built InversifyJS because of them, I wro…
Design Patterns: Reusable Solutions to Recurring Problems
Design Patterns: Reusable Solutions to Recurring Problems A practical guide to classic design patterns in C#/.NET — Factory, Singleton, Repository,…
Full practical guide on creating production-grade webhook receivers
Throughout my career I have designed and implement tens of webhook handlers from Payments systems and delivery trackers to chat and real time commun…
Understanding CQRS: A Practical Guide to Command Query Responsibility Segregation
When you're building an application that needs to handle complex business logic, scale to millions of users, or maintain separation of concerns, you…
Prototype & Factory Method Design Patterns in Java - ClauseGuard
Introduction When ClauseGuard processes an uploaded contract, two problems appear immediately at scale. First, it needs to pick the right document p…
The Decorator Pattern in Java: Adding Behavior Without Breaking Everything
Decorator Design Pattern in Java: Add Features Without Changing Existing Code Introduction When developing Java applications, you may need to add ne…
Why Your LLM Calls Need a Circuit Breaker: A Lesson from Last Party 🔌
Carnival time has begun. 🎉 We are organizing a house party, and if you are in and around Bangalore, you are invited. Just one condition: Don't be la…
Important Design Patterns in a Nutshell
When building complex software systems, writing code that simply "works" is not enough. As systems scale and requirements evolve, poorly structured…
Simple Factory, Factory Method, Abstract Factory — Which One Do You Need?
The Problem You're building a system that supports multiple databases — MySQL, PostgreSQL, MongoDB. Different services in your application need to c…
Never Create an Invalid Object Again — The Builder Pattern
A real story from building a manuscript submission system at a scientific publishing company. We were building a system at a Publishing Company that…
The Ideal Cart: 5 Design Patterns That Earn Their Keep (and 2 Refused)
It all starts with a review question. I was reworking my notes on the Design Patterns book , the Gang of Four one, with examples that all came from…
Stop Editing Working Code: Understanding the Open/Closed Principle in Python
Every time a new requirement arrives, do you find yourself opening the same function and adding another elif block? If yes, your code may be signali…
The Factory Pattern: Simplified
The Problem You're building a system that supports multiple databases — MySQL, PostgreSQL, MongoDB. Different services in your application need to c…
Making ServiceLoader usable: a provider factory
I keep coming back to java.util.ServiceLoader . I have used it to put a JSON layer behind a contract, so the core code carries no direct dependency…
Environments Are Not Features
I wanted a sandbox. Not the decorative kind. Not the one where production data wears a fake name tag and hopes nobody notices. A real sandbox. One w…
Design Patterns in Ruby #2: Observer Pattern
Applications often need to react when something changes. When a user signs up, you might want to: Send a welcome email Create a user profile Log the…
Composition over Inheritance
C++ has a lot of double-edged swords. These features abstract the process of turning the sharp edge on yourself, so that you can destroy yourself wi…
Builder Design Pattern - Simplified
A real story from building a manuscript submission system at a scientific publishing company. We were building a system at a Publishing Company that…
Flexible density for all the UI
In our UI system we dont use pixel values to define spacing, we use semantic variables, (t-shirt sizes: gap-sm , p-lg , my-2xl ) - so thats like you…
Enterprise Design Patterns in Python: Repository & Unit of Work — Real-World E-Commerce Example
Enterprise Design Patterns in Python: Repository & Unit of Work 🐍🏗️ Series: Enterprise Application Architecture | Source: Fowler's EAA Catalog |…
AI Added Caching to Your Code — And Quietly Polluted Your Business Logic
Originally published at recca0120.github.io Ask AI to add caching to your code, and it will. The result looks clean — cache logic extracted into a s…
Introducing the ArchUnit Checker for the Clprolf Framework
One of the most interesting aspects of architectural frameworks is not the rules themselves, but the ability to verify that those rules are actually…
Benevolent Viruses — A Design Pattern for Ethical AI
Last month I ran an outreach campaign. I emailed 25 people — researchers, advocates, technologists — the kind of humans who think about how AI shoul…
The Repository Pattern and AQC — Part 1 of 3: Cleaning Up the Internals
The Series This is the first article in a three-part series on migrating from a traditional Repository Pattern implementation toward Atomic Query Co…
Language-Agnostic Code Generation: The Driver Plugin Model
TestSmith generates test scaffolds for five languages: Go, Python, TypeScript, Java, and C#. Each language has its own project structure conventions…
Singleton Design Pattern in Java — From Naive to Thread-Safe
What is the need for Singleton Pattern ? Let's say we need to connect to DB and for every request if we keep creating a new Instance of Db connectio…
Swift Protocol Magic II: Designing a Reusable Location Tracking System
How to stop rewriting CLLocationManager boilerplate in every screen — and design something your future self will actually thank you for.* If you've…