Backend Engineering
Knowledge Graph
Learn backend concepts through a connected graph. Understand what each topic means, why it exists, and how to implement it across multiple languages.
79 concepts · 5 languages · 6 paths
How it works
Not another
online course.
Graphly is a knowledge graph, not a playlist. Jump in anywhere, follow connections, and build understanding at your own pace.
Pick a concept
Start with any topic that interests you. No prerequisites, no sign-ups, no linear order.
Read the explanation
Each concept breaks down the what, why, and when — written for engineers, not academics.
See the code
Real implementations in Go, Python, TypeScript, Java, and Rust. Copy-paste ready.
Follow the graph
Every concept links to its prerequisites and next steps. Your knowledge builds naturally.
Featured
Start with these concepts
Multi-language
One concept,
five implementations.
Every concept comes with production-ready code examples in the languages you actually use. Switch between tabs, compare approaches, copy what you need.
See code examples →Topics
Explore by domain.
Concepts are organized into domains so you can focus on what matters most to your current work.
Why Graphly
Built for how engineers
actually learn.
Non-linear by design
Real knowledge isn't linear. Graphly maps prerequisites and connections so you see how everything fits together.
Production-ready code
Not pseudocode or toy examples. Every snippet is something you could drop into a real service today.
Learn in 10 minutes
Each concept is a focused, self-contained read. No hour-long videos. No filler content. Just the essential mental model.
Open source.
Graphly is free and open source. Contribute new concepts, fix explanations, or add implementations in your favorite language.
79 concepts across 5 languages
6 structured learning paths
Community-driven & always growing