#design-patterns

Spectral Types: A Different Way to Think About Identity, Representation, and Enumeration (The…

There is a category of types that is difficult to describe using the usual vocabulary of programming languages.

The Probabilistic-Deterministic Sandwich: Why Agentic AI Needs the “Belt & Suspenders” Pattern

In traditional software engineering, the "belt and suspenders" pattern was always a hallmark of good defensive design.

Teaching Excanon to Understand “Run This After That”: Introducing Rule Dependencies

If you’ve ever built a rule engine, you’ve hit this wall: rules are supposed to be independent, declarative statements — but real business…

Java Design Patterns Explained: Part 2— Understanding Factory Design Pattern with Real-World Social…

If you’re joining this series for the first time, welcome! Before we explore the Factory Design Pattern, I’d recommend starting with Part…

Observer Design Pattern

The Observer design pattern, also known as the Publish-Subscribe or Dependents, is a behavioral design pattern.

Java Design Patterns Explained: Part 1 — Understanding Design Patterns with Real-World Social Media…

Every developer eventually reaches a point where writing code isn’t the biggest challenge — designing clean, maintainable, and scalable…

Abstract Factory — Families of Objects That Always Match

Create whole families of related objects without naming a single concrete class, and kill the platform if/else sprawl

Transactional Outbox Pattern

The Transactional Outbox Pattern solves the dual-write problem, where updating a database and publishing a message separately can lead to…

Visitor Pattern: From C++11 to C++26 Pattern Matching

Visitor design pattern allows you to decouple the classes from the operations performed on them. It is ideal for adding new operations…

Your Login Method Is One if-Block Away From Disaster

There’s a pattern that fixes it — and one of the most-used auth libraries on the planet named itself after it.

Design Patterns in C# Part 1: Creational Patterns — Singleton, Factory Method, Builder, and…

Design patterns come up constantly in technical interviews, and get explained inconsistently almost everywhere — either as abstract UML…

Object Pool Pattern in Unity: Performance Optimization from Theory to Practice

Why is your game freezing? Meet the dark side of Instantiate and Destroy.

5 Backend System Design Patterns Every Software Engineer Should Know

Learn how modern backend systems solve real production problems using Outbox, Saga, Cache-Aside, Idempotency, and CQRS. We’ll build a…

Beyond Design Patterns: Reusing Business Logic via Object Algebras

“Hold these three items in the customer’s cart for ten minutes while they complete payment.”

Singleton Design Pattern in C#: Implementation, Example, and Best Practices

The Singleton Design Pattern is one of the most commonly discussed creational design patterns in C# and .NET interviews. The main purpose…

Stop Hardcoding Business Rules: Building Dynamic Rule Engines in Elixir with Excanon

Software systems inevitably accumulate business logic.

How I Get AI to Write Cleaner React Code with 4 Architecture Patterns

If AI is writing most of your React code… who’s designing your architecture?

Specification Pattern in C#

Imagine you are a developer responsible for maintaining an HR employee portal. This is the Employee class:

Why Repository Pattern Is Important in .NET: A Complete Guide with Examples

When building a .NET application, one of the biggest challenges is keeping the code clean, maintainable, and easy to test. Many beginners…

Memorizing Design Patterns Is a Waste of Time. Use This Decision Tree Instead.

How to go from “I know what Strategy is” to “I know when to use it”

จาก Monolith สู่ Microservices: จุดเริ่มต้นของซีรีส์ Distributed Systems & Design Patterns

“การสร้าง Microservices ไม่ใช่เรื่องยาก แต่การทำให้หลาย Service ทำงานร่วมกันได้อย่างถูกต้องต่างหาก คือความท้าทายที่แท้จริง”

Strategy Design Pattern

Strategy Design Pattern in Java — A Complete Guide with Real-World Examples

Bridge Design Pattern Using Golang

What is Bridge Design Pattern ?

Observer Design Pattern in Swift: The Complete Guide Every iOS Developer Needs

A deep dive into what Observer is, how it works under the hood, when to use it, when to avoid it, and how to use it correctly in real iOS…

Design Patterns Won’t Save You If You Don’t Know When to Use Them (Part 2 of 2)

Part 2 of 2 — Covers 11 behavioral patterns: The Communicators and Strategists.

Design Patterns Won’t Save You If You Don’t Know When to Use Them (Part 1 of 2)

Part 1 of 2 — Covers 12 structural patterns: The Builders, Architects, and Connectors.

I Built the Same Feature 4 Times Using Different React Patterns

Data Collection With a DAG

Most systems start the same way. You need data from a few APIs. You transform it. You produce some final result. The natural move is to…

BFF vs SDUI: Before You Build an SDUI Engine, Make Sure You Don’t Just Need a BFF

You’ve probably heard both of these terms in app-building talks: Backend for Frontend (BFF) and Server-Driven UI (SDUI). They sound alike…

Design Pattern — Factory Method

How subclasses take over object creation — and when to let them

Design Patterns in C# — Real Enterprise Examples That Actually Work in Production

Stop memorising UML diagrams. Start seeing patterns in the code you write every day.

Most Design patterns don’t belong in Go

The Programming Patterns Everyone Repeats Without Asking If They Still Make Sense

Builder Design Pattern Using Golang

What is Builder Design Pattern ?

How One Unchecked Loop Almost Tanked Our App

It was 3:12 AM when the pager screamed. Our patient monitoring dashboard — the one doctors rely on for real-time vitals — was showing a…

Reflection architectural pattern

Architectural software patterns capture successful designs for recurring problems in software architecture. Software systems transform over…

Higher Order Functions in Go: Why It Matters and How to Use It

Explore few common patterns where Higher Order Functions shine in Go. You might already using some of these without realizing it. The goal..

5 Design Patterns Every Developer Should Know 🚀

You know when we code, sometimes it gets so messy that even we can’t understand our own code later 😅 (sometimes looking at our own code…

Your Database is Bi-Polar: The High-Stakes Bet of Killing CRUD in Banking

It was 2:00 PM on a Friday when the “Balance Check” service at our neo-bank hit a wall. Thousands of users were refreshing their screens to…

I accidentally built a plugin system (The Registry Pattern)

A central map where components announce themselves — instead of a central file that imports everything.

The Agent Surface

MCP as a first-class API layer — a design pattern for AI-native microservices, and for bringing the existing enterprise estate into the AI…

Circuit Breaker Pattern in n8n

I started trying design patterns with n8n. I like building things with n8n so I thought it would be good to use it in my learning process…

Event Sourcing: A History Lesson Your Database Actually Wants

Over the past few years I’ve repeatedly landed in the same conversation with clients. A project is going well, the architecture is solid…

Singleton Pattern in Flutter: One Instance, Global Access

A practical guide to implementing the Singleton pattern in Dart and Flutter, built around a real production AppCache example.

The Singleton Pattern: The Most Misunderstood Hero of Software DesignOne instance.

One lifecycle. One place to access it.

Flyweight Design Pattern in Python: Reduce Memory Usage and Improve Performance at Scale

Learn the Flyweight Design Pattern in Python with practical examples, production use cases, FastAPI applications

What is LLD (Low Level Design)

What is LLD (Low-Level Design)

The Singleton Design Pattern: One Instance to Rule Them All

In software engineering, the Singleton Pattern is a simple yet powerful creational design pattern that ensures a class has only one…

I also can create Applications, You are done 📉(But do you know theese?)

I hope almost every developer have heard this exact or mildly similar comments from the people you know. Its been bother me alot too. 😠…

Adding 4 nominees to an FD without making it feel like a bank form

Facade Design Pattern in Python: Simplify Complex Systems with a Clean Interface

Learn the Facade Design Pattern in Python with practical examples, FastAPI use cases, production scenarios, advantages, disadvantages…