Simple explanation for Template Method Pattern
Learn how the Template Method Pattern lets you define the algorithm structure once and let subclasses customize specific steps
Skilled Coder
Professional programming insights, simplified.
System Design: Booking.com / Hotel Booking System
A deep dive into the architecture of an online hotel booking platform that handles searches, availability checks, room locks, payments, and more.
System Design: Q&A Platform (Like Stack Overflow or Quora)
A comprehensive backend design for a scalable Q&A platform like Stack Overflow or Quora, covering services, data flows, and SEO considerations.
System Design: Zoom / Video Conferencing Platform
Detailed design of a scalable video conferencing platform similar to Zoom, covering signaling, media routing, recording, and scaling considerations.
System Design: Notification System
A deep dive into designing a scalable, reliable multi-channel notification system supporting in-app, push, and email alerts.
Understanding Consistency Models in Distributed Systems
A detailed explanation of different consistency models and when to use them
Common Algorithms and Techniques Every Developer Should Know
An overview of essential algorithms and techniques across various domains of software development, from load balancing to data compression.
Debugging Concepts Every Developer Should Know
An overview of essential debugging concepts and techniques that every software developer should be familiar with.
How a File is Read from Disk
A step-by-step explanation of how an operating system reads a file from disk, from your code's request to data in memory.
How S3 Works Internally
A look under the hood at Amazon S3's internal architecture and how it stores and manages your data with high durability and availability.
CLI Tools Every Developer Should Know
A practical guide to the most useful command-line tools for developers, with explanations and usage tips.
Low Level Design: Core Classes in a Logging Library
A deep dive into the essential classes and design patterns for building a robust logging library, with Java code examples.
System Design: Dropbox / Google Drive (Cloud File Storage)
A comprehensive examination of how cloud file storage services like Dropbox and Google Drive are designed to handle file versioning, synchronization, and sharing across multiple devices.
How AWS Lambda (or Serverless) Works
A step-by-step explanation of how AWS Lambda and serverless functions work, from deployment to execution and scaling.
The End of Programming as We Knew It
AI is rapidly replacing traditional software engineering practices. If you're still learning the old way—manual coding, debugging, and design patterns—you're already falling behind.
How Context Switching Works Internally in Operating Systems
A detailed explanation of how operating systems perform context switching to multitask between processes and threads.
How a Java Web Request Travels Through a Spring Boot Application
A comprehensive explanation of how an HTTP request flows through a Spring Boot application, from browser to database and back.
How Memory Management Works in Operating Systems
A comprehensive explanation of how operating systems manage memory, from virtual memory to paging and swapping.
How Build Tools Like Maven and Gradle Work
A comprehensive explanation of how Java build tools automate the development process
Design Patterns: Observer Pattern Explained Simply
A clear explanation of the Observer Pattern, when to use it, and how it helps decouple your code by implementing a publish-subscribe model.
Fundamental Authentication & Authorization Concepts
A comprehensive guide to essential authentication and authorization concepts every developer should understand for building secure applications.
Real-World Backend Engineering Concepts
Essential backend engineering concepts that every developer should understand for building robust, scalable, and maintainable systems.
How ZooKeeper Works from Start to Finish
A comprehensive explanation of Apache ZooKeeper architecture and how it enables distributed coordination
Advanced Database Concepts Every Developer Should Know
A comprehensive guide to critical database concepts that power modern applications and ensure data reliability.
Basic Git Concepts Every Developer Should Know
A comprehensive guide to essential Git concepts that every developer needs to understand for effective version control.
System Design: WhatsApp / Real-Time Chat Application
Learn how to design a scalable real-time messaging system with end-to-end encryption like WhatsApp.
How MongoDB Works from Start to Finish
An inside look at how MongoDB stores and processes data differently from traditional relational databases
What Happens When a User Signs Up?
A behind-the-scenes look at the complex processes that happen in seconds when a user signs up
Testing Concepts Every Developer Should Know
A comprehensive overview of key testing concepts and methodologies that are essential for writing reliable, maintainable software.
How WebSockets Work from Start to Finish
A detailed explanation of how WebSockets enable real-time, two-way communication on the web
Command Pattern: Encapsulating Actions as Objects
Learn how the Command Pattern separates 'what to do' from 'how to trigger it' to create more flexible and maintainable code
System Design: Uber / Ride-Hailing App
A detailed breakdown of how ride-hailing platforms like Uber are architected to handle millions of concurrent users and real-time location tracking
How Git Works From Inside Out
A comprehensive explanation of Git's internal architecture and how it tracks changes to your code
Design Patterns: Strategy Pattern Explained Simply
A clear explanation of the Strategy Pattern, when to use it, and how it helps you avoid messy if-else chains when implementing multiple behaviors.
Simple Explanation for Iterator Pattern
Understand the Iterator Pattern with a real-world example of handling different types of collections in Java
How Kubernetes Works from Start to Finish
A comprehensive explanation of Kubernetes architecture and how it orchestrates containers in a cluster
Backend System Design of a Rate Limiter
Learn how to design and implement an effective API rate limiting system to prevent abuse and ensure fair usage.
How Kafka Works End to End
A comprehensive explanation of Apache Kafka architecture and how it enables high-throughput message streaming
How Redis Works End to End
A comprehensive explanation of Redis architecture and how it functions as an in-memory data store
What Happens When You Type google.com
A step-by-step explanation of the behind-the-scenes process that happens when you type a URL in your browser
How Elasticsearch Works from Start to Finish
A comprehensive explanation of Elasticsearch architecture and how it enables powerful search and analytics capabilities
Simple explanation of Decorator Pattern
Learn how the Decorator Pattern helps add functionality to objects without modifying their core code
Simple explanation for Chain of Responsibility Pattern
Learn how the Chain of Responsibility Pattern helps handle requests by creating a chain of handlers with single responsibilities
Fundamental Networking Concepts Every Developer Should Know
A comprehensive guide to essential networking concepts that form the foundation of modern internet communication.
Simple explanation for Builder Pattern
Learn how the Builder Pattern solves complex object creation problems with a clear, step-by-step approach
Designing Scalable News Feed Systems: Architecture & Implementation
Master the architecture behind social media news feeds. Learn fan-out strategies, caching techniques, and database design patterns used by Facebook, Twitter, and LinkedIn to serve millions of users.
How Load Balancers Work (with Reverse Proxy)
A clear explanation of how load balancers distribute traffic and act as reverse proxies
How gRPC Works (Simplified)
A simplified explanation of how gRPC works and why it's faster than traditional REST APIs
Simple explanation for Factory Pattern
Learn how the Factory Pattern helps manage creating different types of notification objects
System Design of a URL Shortener
A detailed overview of how to design a scalable URL shortening service like bit.ly or TinyURL from a system design perspective.
System Design: Video Streaming Service (Like Netflix)
A comprehensive guide to designing a scalable video streaming platform similar to Netflix, covering architecture, video storage, delivery, and scaling strategies.
How Nginx Works from Start to Finish
A comprehensive explanation of how Nginx processes requests and serves content
Fundamental Infrastructure Concepts Every Developer Should Know
A comprehensive guide to essential infrastructure components that power modern cloud and web applications.
Simple explanation for Singleton Pattern
Understand how the Singleton pattern helps manage database connections and shared resources
System Design Fundamentals
Essential concepts and principles for designing scalable, reliable, and efficient systems
Fundamental Operating System Concepts Every Developer Should Know
A comprehensive guide to essential operating system concepts that every software developer should understand.
How REST APIs Work End-to-End
A comprehensive guide to understanding how REST APIs function from request to response
Database Fundamentals Every Developer Should Understand
A comprehensive guide to essential database concepts that form the foundation of modern data management systems.
How a CDN Works from Start to Finish
A detailed explanation of how Content Delivery Networks (CDNs) work to deliver faster web experiences
Fundamental DevOps Concepts Every Developer Should Know
A comprehensive guide to essential DevOps concepts that form the foundation of modern software delivery and operations.
Foundational Frontend Concepts Every Developer Should Know
A comprehensive guide to essential frontend web development concepts that form the foundation of modern user interfaces.
How Docker Works End to End
A comprehensive explanation of Docker's architecture and how containers work from start to finish
How DNS Works from Start to Finish
A step-by-step explanation of how the Domain Name System (DNS) resolves domain names to IP addresses
Fundamental Cloud Concepts Every Developer Should Know
A comprehensive guide to essential cloud computing concepts that form the foundation of modern cloud-based applications.
Foundational Programming Concepts Every Developer Should Know
A comprehensive guide to the essential programming concepts that form the building blocks of modern software development.