---
title: "I Will Build AI Agents, RAG Pipelines and GenAI Apps in Python"
url: https://zinnhub.com/zinns/build-ai-agents-using-langchain-openai-llama-rag-genai-fastapi-python/
description: "Get a custom Generative AI application — AI agents, RAG pipelines, LLM integrations or FastAPI backends — built by a specialist London-based team using LangChain, OpenAI, LLaMA and more."
published: 2025-12-13T15:06:49+00:00
modified: 2026-10-19T17:29:49+00:00
language: en-GB
---

# I Will Build AI Agents, RAG Pipelines and GenAI Apps in Python

If you have a Generative AI idea that needs turning into a working, production-ready application, this is where it happens. Whether you need an autonomous AI agent, a Retrieval-Augmented Generation (RAG) pipeline, an LLM-powered API, or a full GenAI web application, the Zinn Digital team delivers clean, well-documented Python code that is built to scale.

This service covers the full breadth of modern Generative AI engineering. At the entry level you receive research, data preprocessing, API integration and complete source code for a small or medium, well-defined project — delivered in three days. Step up to the Standard tier and model creation, fine-tuning and thorough model documentation are added, giving you a genuinely trained or customised model alongside your application. The Full Build tier adds model validation, testing and performance monitoring, giving you end-to-end confidence before your application goes live.

What is included across all tiers:
 • Bespoke GenAI web applications powered by state-of-the-art models
 • LangChain and LangGraph pipelines for dynamic, multi-step AI workflows
 • AI Agents and Agentic AI systems capable of autonomous, tool-using task resolution
 • RAG (Retrieval-Augmented Generation) for intelligent, context-aware data retrieval
 • FastAPI integration for high-performance, production-grade backend APIs
 • Transformer models for NLP tasks including text generation and classification
 • LLM deployment using OpenAI, Groq and LLaMA for real-time applications
 • Modular, component-based architecture for maintainable and scalable codebases
 • Full source code delivered with every order

How it works: after placing your order, provide a clear brief via the order chat. The team will review your requirements and reach out if any clarification is needed before development begins. You will receive iterative updates and have unlimited revisions to ensure the final delivery matches your vision.

This service is ideal for startups prototyping an AI product, developers who need a specialist to implement complex GenAI architecture, businesses integrating LLMs into existing workflows, and researchers needing rapid proof-of-concept builds.

Zinn Digital is a London-based team with deep expertise in Generative AI, Agentic AI, API development and [machine learning](https://zinnhub.com/zinns/develop-machine-learning-generative-ai-models-and-data-science-projects/) engineering. Every project is delivered with scalable architecture, secure implementation and clean, readable documentation — so your team can maintain and extend the work confidently long after delivery.