---
title: "Real-world systems"
description: "Build and design real systems, from a rate limiter with code to payments, chat, and social feeds, each linked to the fundamentals it uses."
canonical_url: "https://fanout.sh/system/systems"
md_url: "https://fanout.sh/system/systems.md"
access: "public"
---

# Real-world systems

Build and design real systems, from a rate limiter with code to payments, chat, and social feeds, each linked to the fundamentals it uses.

---
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