Building Projects

Building Projects is where theory meets reality. In this section, we take the Data Structures, Algorithms, and System Design concepts you've learned and apply them to build real-world, production-ready applications.

The Project Portfolio

Each guide in this section is a step-by-step case study on architectural decision-making and implementation:

URL Shortener

Design a system like Bitly. Learn about Hashing, Key-Value storage, and high-performance redirection.

• Design a URL Shortener

Scalable Chat System

Build a real-time system like Discord or Slack. Focus on WebSockets, Message Queues, and managing state across multiple servers.

• Build a Chat System

News Feed Architecture

How does Facebook or Instagram scale to billions of posts? Learn about fan-out patterns, caching, and feed generation.

• Architect a News Feed

Video Streaming

Master the complexities of data ingestion and delivery for high-bandwidth systems like YouTube or Netflix.

• Building Video Streaming

Web Server from Scratch

Demystify the magic of standard libraries. Build a raw HTTP server over TCP sockets from the ground up.

• Build a Web Server

Beyond the Code

Each project walkthrough focuses on:

• Requirement Gathering: Defining scope and scale.
• Component Design: Choosing the right DB and Cache.
• Scaling Bottlenecks: Identifying what breaks when you hit 1M users.

Select a project from the sidebar to start building!