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

15. Evaluation & Metrics

16. Analytics & Feedback

17. LLMs in Search

18. Build from Scratch

18.1 Inverted index
18.2 Ranking
18.3 Filters
18.4 Vector search
18.5 LTR
18.6 Distributed
18.7 Productionizing

19. Case Studies

20. Failure Modes

21. Org Structure

22. Startup Angle

23. Engineer's Mindset

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14. Building a Search Engine from Scratch

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