The Cypher Hub | The Cypher Hub

01

API Gateway Patterns: The Microservices Front Door

Don't expose your services directly. Explore how API Gateways handle authentication, rate limiting, SSL termination, and request routing.

Jan 12•9 min read•System Design

02

Consistent Hashing: How Discord Scales to Billions of Users

Why simple modulo hashing fails at scale. Learn how Consistent Hashing allows Discord to add or remove nodes without rebalancing the entire cluster.

Jan 12•9 min read•System Design

03

How Digital Wallets Work: A 2026 System Design Guide

Dive into the engineering behind digital wallets in 2026. Master immutable ledgers, ISO 20022, and concurrency control in this system design deep dive.

Jan 5•7 min read•system-design

04

The Uncomfortable Truth About "Standard" AWS Architecture: A Real-World Terraform Postmortem

A candid DevOps postmortem on the friction of building a standard Node.js stack with Terraform and AWS Fargate. Real-world lessons on state, CI/CD, and quotas.

Dec 29•10 min read•devops

05

The Architecture of Agentic AI: How Autonomous Agents Actually Work Under the Hood

Unpack the system design of Agentic AI. Learn how LLMs become autonomous agents using the ReAct loop, Orchestrator-Worker patterns, and vector memory.

Dec 25•8 min read•system-design

06

How to Build a Complete CI/CD Pipeline on AWS Using CodePipeline, CodeBuild, ECS, and ECR

Learn how to design a full CI/CD pipeline on AWS using CodePipeline, CodeBuild, ECR, and ECS. Automate builds, testing, and zero-downtime deployments.

Nov 23•5 min read•devops

07

Spotify Wrapped: The Hidden Engineering Superproject Behind a Global Cultural Moment

Explore the engineering powerhouse behind Spotify Wrapped — from data pipelines and machine learning to global-scale streaming infrastructure.

Nov 10•9 min read•system-design

08

If You Still Use Arrays for Everything, Read This

Stop using arrays for everything in JavaScript. Learn why arrays can hurt performance and clarity in large-scale apps, and discover better alternatives like Set, Map, and LinkedList—with clear, practical code examples.

Jun 6•6 min read•system-design

09

WhatsApp Video Calling: The Engineering Behind Real-Time Communication

Discover how WhatsApp powers real-time video calling for over 2 billion users worldwide. Learn about P2P architecture, WebRTC, encryption, network optimizations, and the engineering behind seamless communication.

Apr 28•5 min read•system-design

10

How Does inDrive Find Your Driver So Fast? Let’s Break It Down

You’re late for a meeting. You step outside, open the inDrive app, type in your destination, and hit "Request a ride." Within seconds, your phone buzzes — a driver is on the way. Seems simple, right? But behind that seamless experience is a high-performance, real-time system capable of handling thousands of simultaneous ride requests across hundreds of cities. In this article, we’ll take a situational deep dive into how inDrive likely finds nearby drivers so fast, breaking down the key tech stack, algorithms, and real-time architecture that powers the magic. Let’s simulate what happens the moment you tap that request button. Absolutely let’s unpack that entire process in deep technical detail, layer by layer, and walk through each component in the chain from the moment the user taps “Request” on the inDrive app.

Apr 15•6 min read•system-design

11

How AI Tools Supercharge Creativity in Software Development—Without Replacing the Human Touch

Imagine you're a solo developer working on a SaaS product idea late into the night. You have a vision for a dashboard that's clean, fast, and intuitive — but you're stuck. Do you create your own authentication from scratch or use Firebase? Should you go serverless or containerized? You fire up ChatGPT for opinions, use Copilot to scaffold a few components, and within an hour, you’ve got two working versions — something that would've taken you an entire weekend before. But something nags at you. Was that your creativity? Or was it AI doing the thinking? This moment captures the quiet tension many developers feel today: Is AI helping us think, or thinking for us? That’s what we’ll explore in this article — how AI tools are transforming the creative process in software development, and how developers can embrace this transformation without losing their creative spark.

Apr 7•3 min read•others

12

What Happens When You Enter a URL in the Browser?

Discover the step-by-step journey of a URL request, from DNS resolution to page rendering. Learn how browsers, servers, and networks work together to load a website instantly.

Mar 31•4 min read•system-design

API Gateway Patterns: The Microservices Front Door

Featured Articles

The Uncomfortable Truth About "Standard" AWS Architecture: A Real-World Terraform Postmortem

The Architecture of Agentic AI: How Autonomous Agents Actually Work Under the Hood

How to Build a Complete CI/CD Pipeline on AWS Using CodePipeline, CodeBuild, ECS, and ECR

Curated Series

System Design Deconstructed

Latest Articles

API Gateway Patterns: The Microservices Front Door

API Gateway Patterns: The Microservices Front Door

Consistent Hashing: How Discord Scales to Billions of Users

How Digital Wallets Work: A 2026 System Design Guide

The Uncomfortable Truth About "Standard" AWS Architecture: A Real-World Terraform Postmortem

The Architecture of Agentic AI: How Autonomous Agents Actually Work Under the Hood

How to Build a Complete CI/CD Pipeline on AWS Using CodePipeline, CodeBuild, ECS, and ECR

Spotify Wrapped: The Hidden Engineering Superproject Behind a Global Cultural Moment

If You Still Use Arrays for Everything, Read This

WhatsApp Video Calling: The Engineering Behind Real-Time Communication

How Does inDrive Find Your Driver So Fast? Let’s Break It Down

How AI Tools Supercharge Creativity in Software Development—Without Replacing the Human Touch

What Happens When You Enter a URL in the Browser?

API Gateway Patterns: The Microservices Front Door

Consistent Hashing: How Discord Scales to Billions of Users

How Digital Wallets Work: A 2026 System Design Guide

The Uncomfortable Truth About "Standard" AWS Architecture: A Real-World Terraform Postmortem

The Architecture of Agentic AI: How Autonomous Agents Actually Work Under the Hood

How to Build a Complete CI/CD Pipeline on AWS Using CodePipeline, CodeBuild, ECS, and ECR

Spotify Wrapped: The Hidden Engineering Superproject Behind a Global Cultural Moment

If You Still Use Arrays for Everything, Read This

WhatsApp Video Calling: The Engineering Behind Real-Time Communication

How Does inDrive Find Your Driver So Fast? Let’s Break It Down

How AI Tools Supercharge Creativity in Software Development—Without Replacing the Human Touch

What Happens When You Enter a URL in the Browser?