codecrafters-io/build-your-own-x
Master programming by recreating your favorite technologies from scratch.
From the publisher
README & documentation
Source previewRead the project’s overview, installation instructions and usage examples. The original README is the source of truth.
[](https://codecrafters.io/github-banner) This repository is a compilation of well-written, step-by-step guides for re-creating our favorite technologies from scratch. It's a great way to learn. [video] [](https://creativecommons.org/publicdomain/zero/1.0/) This repository is the work of many contributors. It was started by Daniel Stefanovic,…
Read the full README ↗ · Preview checked 2026-10-27T22:26:47.469Z
Inside the original README — Document outline
- Build your own <insert-technology-here>
- Tutorials
- Build your own Distributed Systems
- Build your own 3D Renderer
- Build your own AI Model
- Build your own Augmented Reality
- Build your own BitTorrent Client
- Build your own Blockchain / Cryptocurrency
- Build your own Bot
- Build your own Command-Line Tool
- Build your own Database
- Build your own Docker
Headings are captured from the source. Links open the publisher’s document, not a locally hosted copy.
Links from the README
References supplied by the publisher, not independently verified endorsements. Check the destination before downloading files or entering credentials.
- Docker
- Java: Building Your Own Kafka-like System From Scratch: A Step-by-Step Guide
- C# / TypeScript / JavaScript: Learning how to write a 3D soft engine from scratch in C#, TypeScript
- Python: RAG for Document Search
- C#: How To: Augmented Reality App Tutorial for Beginners with Vuforia and Unity 3D
- C#: AR Portal Tutorial with Unity
- C#: How to Augmented Reality AR Tutorial: ARKit Portal to the Upside Down
- Java: Creating Your First Blockchain with Java
- JavaScript: Creating a blockchain with JavaScript
- TypeScript: Naivecoin: a tutorial for building a cryptocurrency
- TypeScript: NaivecoinStake: a tutorial for building a cryptocurrency with the Proof of Stake consens
- Rust: Building A Blockchain in Rust & Substrate
Documentation belongs to its respective authors. A listing is not a grant of reuse or training rights. Confirm the document’s own terms at the source.
What this repository does
Master programming by recreating your favorite technologies from scratch.
Repository facts
- Owner
- codecrafters-io
- Primary language
- Markdown
- Stars
- 557,855
- Forks
- 52,204
- Open issues + pull requests
- 687
- License
- Not reported — inspect the license file
- Archived
- No
- Default branch
- master
- Created
- 2018-05-09T12:03:18.000Z
- Last push
- 2026-07-14T19:25:58.000Z
Topics and intended use
Owner-supplied topics: awesome-list, free, programming, tutorial-code, tutorial-exercises, tutorials
Review the README for scope, installation, examples and limitations. We do not run repository code or certify it.
Evaluate before installing
Review licensing and dependencies, inspect recent commits and unresolved issues, and test in an isolated environment before production use. Stars and forks alone cannot answer these questions.
Source and freshness
Source: GitHub. Metadata observed 2026-10-31T18:43:23.065Z. Daily imports are snapshots, not real-time monitoring.
Popularity and source listings do not establish security, suitability, licensing rights or benchmark performance.
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