🧭 System Design from First Principles

This book teaches you to reason about large-scale systems from first principles — deeply enough to hold your own in a senior design interview, and honestly enough to know how these systems actually behave in production. Every lesson ramps from a beginner-readable opening to expert depth, every claim is grounded in its sources, and every diagram renders.

How to read it. Front to back if you're new: Foundations → Data → Distributed Data → Building Blocks → Patterns. If you're prepping interviews on a deadline, start with Foundations, skim Patterns, then work Case Studies with the Interview Playbook open. If you run systems for a living, Distributed Data and Production Engineering are where this book earns its keep.

Lessons land module by module; titles below become links as they ship.

🧱 01 · Foundations

Trade-off thinking, the vocabulary of requirements, and the numbers sense everything else builds on.

🗄️ 02 · Data Foundations

How data is modeled, stored, indexed, and evolved on a single system — the machinery underneath every database conversation.

🌐 03 · Distributed Data

The book's depth moat: what actually happens when data lives on more than one machine, and which guarantees survive.

🧰 04 · Building Blocks

The infrastructure catalog — what each component is, how it works inside, and when to reach for it.

🧰 05 · Key Technologies

The named products you actually reach for in a design — what each one really is underneath the label, the one mechanism worth knowing, and what naming it commits you to.

🧩 06 · Patterns

Reusable solution shapes that show up in every design — each grounded in the theory from modules 02–03.

🏗️ 07 · Case Studies

Thirteen interview-canonical systems designed end-to-end — requirements → entities → API → high-level design → the deep-dives that decide the interview — plus a capstone: the platform serving you this book, designed with the same framework and checkable against its live deployment.

🏭 08 · Production Engineering

Beyond the whiteboard: how industry actually ships, observes, scales, and survives these systems.

🎯 09 · Interview Playbook

The delivery machinery: how to drive a 45-minute design interview from any seniority level.

📖 10 · Reference

Look-up material — kept short and current.