Systems Atlas

Search Engineering Guide

0. How to Read This

1. The Business & Product

2. Understanding the User Query

3. Indexing & Infrastructure

4. Data Foundation

6. Vector & Semantic Search

7. Training Embedding Models

9. UI Layout & Result Display

10. Ads in Search Results

11. Personalization

12. Caching & Performance

13. System Architecture Design

14. Distributed Architecture

14.1 Distributed systems
14.2 Stateless vs Stateful
14.3 Shards & Replicas
14.4 Fan-out / Fan-in
14.5 Failure modes
14.6 Consistency
14.7 Multi-region

15. Evaluation & Metrics

16. Analytics & Feedback

17. LLMs in Search

18. Build from Scratch

19. Case Studies

20. Failure Modes

21. Org Structure

22. Startup Angle

23. Engineer's Mindset

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Infrastructure

The distributed systems that power search. Sharding, replication, load balancing, and observability.

Detailed architecture breakdown coming soon.