Building Customized GenAI Product Development Services in Python
From Prototype to Production-Ready Platform In this post I’ll walk through how to build a reusable GenAI service layer that supports: Chat with any LLM (OpenAI or local) Retrieval-Augmented Generation (RAG) Document ingestion & vector indexing Basic evaluation workflow This is the same foundation I use when delivering custom GenAI products for enterprises — from internal copilots to knowledge assistants and AI agents. 1. Why a “Service Layer” Matters Most teams start with: Script → Prompt → API call → Demo But real products require: versioned prompts retrieval from private data latency tracking evaluation & guardrails vendor flexibility So we build a thin platform instead of one-off notebooks. Architecture User → FastAPI → LLM Client ↳ OpenAI / Local Model → Vector Store (FAISS) → RAG Orchestrator → Evaluation Engine 2. Core Design Goals Provider Agnostic — OpenAI today, local ...