The Engineer's HandbookSystem Design, Design Patterns & Database Engineering

master engineering, one concept at a time.

System Design

25 chapters · ~14 hours — From fundamentals to real-world case studies. Scalability, distributed systems, architecture patterns, and interview prep. Everything you need to think like a senior engineer at scale.

Start learning

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Design Patterns

6 chapters · ~4 hours — Creational, structural, behavioral, modern application, and distributed system patterns. Practical Go examples with BEFORE/AFTER code.

Learn patterns

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Database Engineering

16 chapters · ~10 hours — How big systems design their databases. PostgreSQL internals, sharding strategies, query optimization, and real-world case studies from Instagram, Discord, and Uber.

Master databases

┌─────────────────────────────────────────────────────────┐
│          THE ENGINEER'S HANDBOOK v3.0.0                 │
│                                                         │
│  > 47 chapters    > 27 patterns    > 1 objective        │
│  > Think like a senior engineer at scale                │
│                                                         │
│  $ cat handbook --sections                              │
│    system-design/     25 chapters                       │
│    design-patterns/    6 chapters                       │
│    database/          16 chapters                       │
└─────────────────────────────────────────────────────────┘

Inspired by Alex Xu's System Design Interview series, Martin Kleppmann's Designing Data-Intensive Applications, the Google SRE books, and the Gang of Four's Design Patterns. All interpretations, diagrams, and code examples are original.