Backend Engineering

Building a Production RAG API with FastAPI and pgvector

A step-by-step build of a production RAG API using FastAPI, PostgreSQL with pgvector, hybrid search, and a reranking step, including index tuning notes.

Sachin SharmaCreator

Jul 20, 2026

9 min read

Building a Production RAG API with FastAPI and pgvector

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Quick Overview

A step-by-step build of a production RAG API using FastAPI, PostgreSQL with pgvector, hybrid search, and a reranking step, including index tuning notes.

FastAPI RAG pgvector PostgreSQL Python

Sachin Sharma

Full Stack Developer & Mobile Engineer

Building digital experiences at the intersection of design and code. Sharing weekly insights on engineering, productivity, and the future of tech.

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