Vector Databases & HNSW Indexing

Stores high-dimensional embeddings and performs approximate nearest neighbor (ANN) search using Hierarchical Navigable Small World graphs in sub-10ms.

STAFF ENGINEER TAKEAWAY: HNSW transforms high-dimensional semantic search from an intractable O(N) brute force scan into an O(log N) multi-layer skip-list graph traversal.

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Unlock Vector Databases & HNSW Indexing & All 150+ Visual Architecture Deep Dives

This advanced distributed system deep-dive includes interactive packet visualizers, state machine transitions, and FAANG interview trade-off blueprints.

More Topics in 12. AI Engineering

📚RAG Pipeline (Retrieval-Augmented Generation)

Augments LLM prompt context by retrieving semantically relevant text chunks from private vector databases before generating answers.

🚪AI Gateway & Smart Fallback Proxy

A unified reverse proxy sitting between applications and LLM providers that manages semantic caching, cost rate-limiting, and automated failover.

🤖Agentic ReAct (Reasoning + Acting)

An autonomous agent paradigm that interleaves reasoning (Thought), tool execution (Action), and observation (Observation) to solve multi-step problems.

🔎Hybrid Search & Cross-Encoder Reranking

Combines sparse keyword search (BM25) with dense semantic vector search via Reciprocal Rank Fusion (RRF), followed by a Cohere cross-encoder reranker.