Improve programming skills by rebuilding tech from scratch. For startup founders and programmers.
advancedโฑ 1-2 days๐ต Free
512,463 stars48,561 forksMarkdownQuality 9/10Updated 2/21/2026100% free ยท open source
What it is
Create replicas of your favorite technologies from scratch.
What you can make with it
Reproductions of complex technologies like Instagram, YouTube, or Netflix, allowing you to deeply understand how they work.
How it helps
Mastering programming by building entire systems helps developers learn complex concepts and gain hands-on experience.
Real use case example
"A founder wanting to understand how their favorite SaaS app handles user authentication can rebuild it using this skill."
If you're new
This skill is perfect for beginners looking to learn complex concepts through practical experience.
If you're senior
Senior developers can use this skill to deepen their knowledge of software development and system design.
Common confusion cleared up
Don't worry if you're not sure where to start - the skill's purpose is to guide you through the process of recreating popular technologies.
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Pairs with
Stripe webhookNotion database
Why we list it on WorkflowStacks: Our marketplace offers this skill as a resource for developers to improve their skills through self-directed projects.
What it does
Build-your-own-x helps startup founders master programming by guiding them to recreate their favorite technologies from scratch
Install / run
Visit https://github.com/codecrafters-io/build-your-own-x and follow the repository's instructions to get started
When to use it
โขWhen you want to deeply understand how a specific technology works
โขWhen you're looking to improve your programming skills through hands-on exercises
โขWhen you need to customize or extend an existing technology for your startup
Quick start
1Explore the repository's various 'build-your-own' guides, such as building a Redis or a React from scratch
2Choose a guide that aligns with your interests and skills, and follow the step-by-step instructions
3Use a Markdown editor or viewer to easily read and navigate the guide's Markdown files
4Start with the basics and gradually move on to more complex projects, using the guide's code examples and explanations as references
5Join the community or forums associated with the repository to ask questions and get help when needed
Ready-to-paste prompt
Start with the 'build-your-own-redis' guide by navigating to the corresponding Markdown file and following the instructions to recreate a simplified version of Redis
Heads up: Make sure you have a good understanding of programming fundamentals and the specific technology you're trying to recreate, as the guides assume a certain level of prior knowledge and may not provide extensive explanations of basic concepts
Saves to your device
Topics
awesome-list
free
programming
tutorial-code
tutorial-exercises
tutorials
What's inside โ free to inspect
No purchase needed
Read the entire source before you build โ unlike paid marketplaces that hide it behind a buy button.