---
title: "I Will Build Custom Gen AI Solutions, LLMs, RAG and AI Chatbots"
url: https://zinnhub.com/zinns/build-gen-ai-solutions-rag-train-ai-models-llm-chatgpt-ai-chatbot/
description: "Get a tailored AI product — from RAG pipelines and fine-tuned LLMs to custom GPTs and AI agents — built by a London-based full-stack AI development team that turns complex requirements into production-ready solutions."
published: 2025-11-16T02:08:24+00:00
modified: 2026-07-01T01:02:20+00:00
language: en-GB
---

# I Will Build Custom Gen AI Solutions, LLMs, RAG and AI Chatbots

If your business is ready to harness the genuine power of artificial intelligence — not just a wrapper around a generic chatbot — you are in the right place.

Zinn Digital is a London-based AI and full-stack development team specialising in building bespoke, production-grade AI products. Whether you need a retrieval-augmented generation (RAG) pipeline that answers questions from your private documents, a fine-tuned language model trained on your own data, a custom GPT with tailored actions, or a fully autonomous AI agent, this service delivers a working solution built precisely around your requirements.

\*\*What We Build\*\*

— OpenAI integrations and custom LLM applications
 — Custom GPTs and GPT Actions connected to your systems
 — RAG pipelines using LangChain and LlamaIndex
 — Fine-tuned models with LoRA and QLoRA techniques
 — Synthetic data generation and dataset creation for fine-tuning
 — SQL and vector search integrations (including Pinecone)
 — AI agents capable of autonomous multi-step reasoning
 — Document-based chatbots that query your private files without relying on third-party APIs
 — End-to-end AI platforms with web and mobile front-ends

\*\*How It Works\*\*

Once your order is placed, share your project requirements via the order chat. The team reviews your brief, asks any clarifying questions upfront, and confirms the scope before development begins. You receive a working AI product, tested and ready to deploy, delivered within the agreed timeframe. Revisions are included to ensure the output meets your expectations.

\*\*Who This Is For\*\*

This service suits founders, product teams, enterprises and technical leads who need AI built properly — not a no-code toy, but a real, scalable, maintainable solution. It is equally suited to those who want a quick proof-of-concept at the entry tier and those who need a comprehensive, deeply integrated AI platform at the premium tier.

\*\*Why Zinn Digital\*\*

The team combines deep expertise across the modern AI stack — OpenAI, LangChain, LlamaIndex, vector databases, fine-tuning pipelines — with full-stack engineering capability. Clients describe the experience as seamless, noting that requirements are thoroughly understood before a single line of code is written. Based in London, the team brings both technical precision and clear communication to every engagement.