The System Design Newsletter | Neo Kim | Substack

System Design Playbook 🔥

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May 23, 2025 • Neo Kim

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How Stock Exchange Works

Nov 18, 2025 • Neo Kim

How Stripe Prevents Double Payment Using Idempotent API

May 9, 2024 • Neo Kim

How Uber Finds Nearby Drivers at 1 Million Requests per Second

Jan 4, 2024 • Neo Kim

I struggled with system design until I learned these 114 concepts

Feb 7 • Neo Kim

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Recent posts

How Virtual Machines Work - A Deep Dive

#148: Part 1 - DevOps Mastermind

May 25 • Neo Kim and Ayaan

AI Agents: State, Memory, Consistency - A Deep Dive

#147: Understanding State, Memory, and Consistency in AI Agents

May 17 • Neo Kim and Sivasankar Natarajan

How ML Systems Actually Work: From Data to Deployment

#146: From Embeddings to Feature Stores - 38 Concepts That Power Netflix, Uber, and Spotify

May 12 • Paolo Perrone and Neo Kim

I struggled with mobile system design until I learned these 53 concepts

#145: Part 2 - Conflict resolution, certificate pinning, rendering performance, and 17 others.

May 7 • Shefali Jangid and Neo Kim

Design a personal AI chat assistant

#144: Part 2 - Generative AI Masterclass

May 4 • Neo Kim and Louis-François Bouchard

Multi-Agent Architectures, Clearly Explained

#143: Coordination architectures, protocols connecting them, and how to pick the right one before you write any code.

Apr 30 • Neo Kim

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