🚀 An ebook that takes FastAPI from your first endpoint all the way to production-scale AI systems — going deep on LLM/RAG serving, with interview questions at the end of every chapter.
Title: FastAPI for AI Engineers: From First Endpoint to Production-Scale AI Systems
URL:
🚀 Overview
A practical guide (First Edition, 2026, by AI Engineering Insider) for AI engineers serving ML models and LLM/RAG systems in production with Python. It spans 10 chapters and 100 interview questions, woven with real-incident case studies and cost-model sidebars.
❓ Challenges Solved
・Building a model is one skill; serving it safely as a scalable production API is another
・LLM/RAG serving has its own hard parts — streaming, guardrails, cost control
The book reframes FastAPI as "the de facto serving layer for AI and ML systems."
💡 Structure & Tech Covered
・Foundations: ASGI/WSGI, Uvicorn, OpenAPI, and Pydantic v2 schema separation and validation
・Implementation: idempotency, meaningful status codes, pagination, and the Router→Service→Repository clean architecture
・DB/Security: SQLAlchemy/SQLModel/Alembic, N+1, pool sizing, JWT, BOLA defense, OWASP API Top 10
・Async: "never block the event loop," def vs async def, and httpx retries/circuit breakers
🎯 The Core (Ch.9: AI/RAG/LLM)
・Load model weights once in lifespan; offload CPU inference to a thread
・An LLM gateway centralizing auth, prompts, guardrails, and cost metering, with SSE token streaming
・Build RAG with embeddings + a vector DB (start with pgvector); validate output with Pydantic, then retry on failure
・Enforce max_tokens as a "spending limit" via the type system
📊 Highlights
・Practice-first, learning from real incidents (Netflix, Stripe, GitLab, Optus, Air Canada)
・Ch.10 covers Gunicorn+Uvicorn, K8s liveness/readiness, the three pillars of observability (p99 vs p50), and SLO-based alerting
#
FastAPI# #
AIEngineering#