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

16.1 What to log
16.2 Query analytics
16.3 Zero results
16.4 Reformulation
16.5 Error analysis
16.6 Improvement loop

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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12. Search Analytics & Feedback Loops

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