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

12.1 Latency sources
12.2 Types of caches
12.3 Semantic cache
12.4 Invalidation
12.5 Tail latency (P99)
12.6 Capacity planning
12.7 QPS modeling
12.8 Cost vs Performance

13. System Architecture Design

14. Distributed Architecture

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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Caching

Optimizing for millisecond latency. Result caching, list caching, and invalidation strategies.

Detailed architecture breakdown coming soon.