
Closed
Posted
Paid on delivery
I need a production-ready chatbot that can sit behind the company firewall and answer product questions, search our knowledge base, and summarise internal documents. The core must be a Retrieval-Augmented Generation pipeline built with LangChain, LlamaIndex, or a comparable framework, and wired to a vector database such as Pinecone, Milvus, or FAISS for embedding storage. Python is the language of choice. I’m comfortable with either FastAPI or Flask, so feel free to work with whichever lets you move fastest. The LLM layer should default to GPT-4 Turbo for its accuracy, yet the codebase has to stay modular enough to swap in Qwen or ChatGLM when we need stronger Chinese support. Key pieces you’ll handle • Backend service that exposes clean REST endpoints for chat, document upload, and admin tasks • RAG workflow that chunks, embeds, stores, and retrieves private data securely • Prompt engineering and response tuning to keep answers concise, cited, and free of hallucinations • Integration of at least one vector store and one LLM provider, with environment-variable configuration • Unit tests plus a small command-line or minimal HTML page that proves the flow end-to-end Nice to have but not mandatory: a React or Vue front-end that shows chat history and streaming responses. When you apply, focus on your hands-on experience with LangChain, LlamaIndex, RAG pipelines, vector databases, and any previous GPT-4 or multilingual LLM work. A brief outline of a similar project you’ve delivered will help me judge fit quickly. I’ll share sample documents and the exact knowledge base structure once we agree on the milestones, and I’m happy to iterate together on prompt design and acceptance tests.
Project ID: 40401206
142 proposals
Remote project
Active 17 hours ago
Set your budget and timeframe
Get paid for your work
Outline your proposal
It's free to sign up and bid on jobs
142 freelancers are bidding on average $2,146 HKD for this job

⭐⭐⭐⭐⭐ Build a Production-Ready Chatbot with Retrieval-Augmented Generation ❇️ Hi My Friend, I hope you're doing well. I’ve reviewed your project requirements and see you are looking for a chatbot that can handle product questions and summarize documents. Look no further; Zohaib is here to help you! My team has successfully completed 50+ similar projects focused on chatbot development. I will create a robust Retrieval-Augmented Generation pipeline using LangChain, ensuring it connects seamlessly to a vector database for efficient embedding storage. ➡️ Why Me? I can easily build your production-ready chatbot as I have 5 years of experience in Python development, specializing in chatbot design, REST APIs, and RAG workflows. My expertise includes LangChain, LlamaIndex, and vector databases. I also have a strong grip on FastAPI and Flask, ensuring a modular and flexible codebase. ➡️ Let's have a quick chat to discuss your project in detail and let me show you examples of my previous work. I look forward to discussing this with you. ➡️ Skills & Experience: ✅ Python Development ✅ LangChain ✅ LlamaIndex ✅ Retrieval-Augmented Generation ✅ Vector Databases ✅ FastAPI ✅ Flask ✅ REST API Design ✅ Prompt Engineering ✅ Document Summarization ✅ Unit Testing ✅ Front-End Integration Waiting for your response! Best Regards, Zohaib
$1,240 HKD in 2 days
8.1
8.1

AI EXPERT Hi, I can build your production-ready, firewall-contained RAG chatbot with a strong focus on accuracy, security, and modularity. I’ll implement: A clean FastAPI backend with endpoints for chat, uploads, and admin and robust RAG pipeline (chunking, embeddings, retrieval, response synthesis) Modular LLM layer (GPT-4 Turbo by default, easily switchable to Qwen/ChatGLM) Secure, environment-based configuration Unit tests + a minimal UI/CLI to validate the full flow My approach prioritizes low-latency retrieval, minimal hallucination, and clear traceability in responses. Happy to share similar RAG implementations and discuss next steps. Thanks, Srishti
$2,500 HKD in 30 days
6.9
6.9

Hello, BUILD A SECURE, ACCURATE RAG CHATBOT THAT YOUR TEAM CAN TRUST—WITH ZERO HALLUCINATIONS. With 12+ years in AI and backend systems, we’ve delivered RAG-based internal assistants using LangChain/LlamaIndex, vector DBs, and GPT-class models—focused on accuracy, security, and modularity. Approach: Develop a production-ready Python backend (FastAPI) with a clean RAG pipeline: document ingestion → chunking → embeddings → vector storage → retrieval → grounded response generation with citations. Core Components: • REST APIs: chat, upload, admin controls • RAG pipeline (LangChain/LlamaIndex) • Vector DB (FAISS/Milvus/Pinecone configurable) • LLM layer (GPT-4 Turbo default, swappable to Qwen/ChatGLM) • Prompt tuning for concise, cited, low-hallucination outputs • Secure, behind-firewall deployment Workflow: Upload docs → chunk/embed → store → user query → retrieve relevant context → generate answer with citations Extras: • Unit tests + CLI or minimal web UI (streaming responses) • Env-based config for easy provider switching • Scalable, modular architecture Thanks
$850 HKD in 7 days
7.1
7.1

Good to see this project, I will build your internal RAG chatbot — REST endpoints for chat, document upload, and admin — with a modular LangChain pipeline backed by FAISS or Pinecone. For the LLM swap requirement, I will abstract the provider layer behind a unified interface with env-var config, so switching from GPT-4 Turbo to Qwen or ChatGLM requires zero code changes. Questions: 1) What document formats will the knowledge base include — PDF, DOCX, HTML, or others? 2) Do you have a preferred chunking granularity — paragraph-level or section-level? Looking forward to potentially working together. Thanks, Kamran
$2,115 HKD in 10 days
7.3
7.3

You’re essentially building an internal assistant that employees can trust—accurate answers from private docs, no leaks, and fast enough to feel like search, not AI. I’d structure this as a clean FastAPI service with isolated RAG layers: ingestion (chunking + metadata), embedding (FAISS or Milvus for on-prem control), and retrieval with strict filtering. Prompts will enforce citation + brevity, with fallback handling when confidence is low to avoid hallucinations. The LLM layer stays swappable via a provider wrapper (GPT-4 Turbo default, Qwen/ChatGLM ready). I’ll also add streaming responses and a simple UI/CLI for validation. Subtle improvement: document versioning + re-indexing strategy to prevent stale answers. I’ve built a similar RAG system (Python + FAISS + LangChain) handling ~50k docs with sub-second retrieval and strong answer grounding. Happy to move this into a working internal tool quickly. Q1: Do documents require role-based access control during retrieval? Q2: Expected document types (PDF, HTML, internal wikis)? Q3: Should embeddings run fully offline or can APIs be used?
$2,500 HKD in 10 days
7.0
7.0

Greetings, Thank you for considering my application for this project. As an AI Engineer and Python Developer with over 8+ years of experience, I bring a wealth of knowledge and expertise in the field of Python, Deep Learning. I have carefully reviewed the project description and am eager to discuss your specific needs and requirements in more detail. My commitment is to provide dedicated support and consistent follow-up throughout the project's lifecycle. Please feel free to reach out to me to further discuss how I can contribute to the success of your project. Looking forward to the opportunity of working together. Best regards, KuroKien
$1,800 HKD in 1 day
6.7
6.7

Hello, I understand you need a secure, production-ready internal RAG chatbot that runs behind your firewall and reliably answers questions from your private knowledge base with accurate, cited responses. I will build a modular Python backend using FastAPI or Flask, designed for easy deployment and future LLM flexibility. The system will implement a full RAG pipeline using LangChain or LlamaIndex, including document ingestion, chunking, embedding generation, and vector storage using FAISS, Pinecone, or Milvus. The architecture will be fully configurable via environment variables so you can switch between GPT-4 Turbo and alternative models like Qwen or ChatGLM without code rewrites. I will expose clean REST APIs for chat, document upload, and admin control, along with prompt tuning to ensure concise, grounded answers with proper source referencing and reduced hallucination risk. The delivery will include unit tests and a minimal CLI or web interface to demonstrate full end-to-end functionality in your environment. Thanks, Asif.
$3,000 HKD in 5 days
6.5
6.5

Hi, Doomshell Software Pvt. Ltd. brings 20+ years of experience in scalable software and AI-driven solutions, and we’d be glad to support your Internal RAG Chatbot Development with a secure, production-ready architecture. Our approach: RAG Pipeline Development • Build secure Retrieval-Augmented Generation workflow using LangChain/LlamaIndex • Document chunking, embeddings, vector search with FAISS/Pinecone/Milvus • Prompt tuning for concise, cited, low-hallucination responses Backend & API Services • Python-based FastAPI/Flask REST endpoints for chat, uploads and admin tasks • Modular LLM integration with GPT-4 and future-ready support for Qwen/ChatGLM • Environment-driven configuration and secure behind-firewall deployment Testing & Deliverables • Unit-tested codebase with documented architecture • End-to-end demo via CLI or lightweight web interface • Production-ready deployment support and handoff documentation Why us: • Strong expertise in Python, RAG pipelines and AI integrations • Focus on secure, modular and maintainable architecture • Milestone-based delivery with collaborative prompt refinement Quick question: Would you like the RAG architecture designed from the start to support hybrid retrieval (keyword + vector search) and model switching for multilingual knowledge sources as your internal data grows? We’d be happy to share relevant AI solution samples and start promptly. Best regards
$1,900 HKD in 7 days
6.3
6.3

Hello dear, Toriqul Global Solutions is a professional web design and development company dedicated to building modern, high-performance, and user-friendly digital solutions. Founded by Engineer Md. Toriqul Islam, a Computer Science & Engineering graduate from RUET, the company has over 10 years of experience delivering scalable and visually appealing websites. Web Design & Development: We are a full-stack web development team with strong experience. Our design approach is modern and simple, helping attract and engage users effectively. We have built websites for various industries and worked with many clients, delivering high-quality solutions. Client satisfaction is always our top priority. Technologies We Use: HTML5, CSS3, Bootstrap, JavaScript, jQuery, Angular, React, Node.js, WordPress, PHP, Laravel, .NET, CodeIgniter, Python, Ruby on Rails, MySQL, MongoDB. Why Choose Us: • Modern, clean, user-focused design • Fully responsive on all devices • Scalable and optimized code • Clean and well-documented work • On-time delivery • Clear communication • Client satisfaction first We have worked with clients across different industries, delivering websites that meet business goals and user expectations. Let’s build something great together. We are ready to discuss your project and start immediately. Best Regards, Toriqul Global Solutions
$1,900 HKD in 7 days
5.7
5.7

Hi there, I’ve carefully reviewed the requirements for your GenAI project and I’m confident that my expertise in building NLP pipelines using Hugging Face and LangChain can meet your expectations. My experience includes working with large language models (LLMs) for Retrieval-Augmented Generation (RAG), as well as fine-tuning models with custom datasets to enhance text generation. I’ve successfully completed similar projects where I applied these techniques in Python to build robust, client-specific solutions. I would love the opportunity to discuss how I can leverage my skills to develop a tailored solution for your project. Feel free to take a look at my portfolio to get a sense of the work I’ve done: Portfolio: https://www.freelancer.com/u/webmasters486/AI-automation Looking forward to hearing from you! Best regards, Muhammad Adil
$2,000 HKD in 4 days
5.3
5.3

Hello, This is exactly the kind of RAG system I’ve built and deployed in secure environments. I’ve worked on internal chatbots that sit behind firewalls, index private documents, and return grounded answers with citations using LangChain/LlamaIndex + vector stores. I’d approach your project with a clean FastAPI backend exposing chat, ingestion, and admin endpoints. Documents will be chunked, embedded, and stored (FAISS or Milvus for on-prem flexibility), with a retrieval layer tuned for accuracy and low latency. GPT-4 Turbo will be the default, but I’ll keep the LLM layer modular so Qwen or ChatGLM can be swapped in easily. Prompt design will focus on concise, source-cited responses and strong guardrails to reduce hallucinations. I’ll include unit tests and a simple UI/CLI to demonstrate full flow, plus clear setup for environment-based configs. Security, maintainability, and reproducibility will be built in from the start.
$1,900 HKD in 7 days
6.2
6.2

Hello, I see that you need a production ready chatbot that will sit behind the company firewall and answer product questions, search your knowledge base, and summarise internal documents. I delivered a similar project last week with a 5-star review and would love to show that in private. Message me and let's talk more about your project and I will share my approach today. Cheers, Fahad.
$1,000 HKD in 2 days
5.4
5.4

Hello, I understand you need a production‑ready RAG chatbot that operates behind your firewall, answers product questions, searches an internal knowledge base, and summarizes documents. My plan is to build a FastAPI service exposing clean REST endpoints for chat, document upload, and admin tasks. I will use LangChain with LlamaIndex to chunk, embed, and store data in FAISS, and connect to GPT‑4 Turbo via OpenAI. The architecture will be modular so you can switch to Qwen or ChatGLM for Chinese support. Prompt engineering will focus on concise, cited answers and hallucination mitigation. I’ll add unit tests and a minimal HTML page to prove the flow. I have built similar RAG pipelines for enterprise clients using FastAPI, FAISS, and GPT‑4. Let’s discuss your knowledge‑base structure and iterate on prompts together. Best Regards Naveen Thakur
$800 HKD in 1 day
5.1
5.1

Hello, I’m excited about the opportunity to develop a production-ready chatbot that meets your specifications. I understand that you need a solution capable of answering product questions, searching your knowledge base, and summarizing internal documents while ensuring secure data handling behind your company firewall. With extensive experience in building Retrieval-Augmented Generation (RAG) pipelines using frameworks like LangChain and LlamaIndex, I am well-versed in integrating vector databases such as Pinecone and FAISS. My proficiency in Python and frameworks like FastAPI and Flask allows me to deliver a robust backend service efficiently. To achieve your project goals, my approach would include: - Developing a backend service with clean REST endpoints for chat and document handling. - Implementing a RAG workflow that securely chunks, embeds, and retrieves data. - Engineering prompts and tuning responses to ensure clarity and accuracy. - Configuring the system for seamless integration with the chosen LLM and vector store. I am eager to start this project and confident in my ability to deliver quality results on time. I would love to discuss further details and explore how we can work together to bring your vision to life. Thank you for considering my proposal!
$800 HKD in 7 days
4.6
4.6

Hello there, I will build a RAG chatbot in Python/FastAPI with LangChain: REST endpoints for chat, upload, and admin, embeddings into Pinecone or Milvus, GPT-4 Turbo with a swap path to Qwen/ChatGLM, plus tests and a minimal demo. For the multilingual swap, the embedding model has to swap with the LLM, not just the LLM alone. I will keep both pluggable so Chinese uses BGE or Qwen embeddings. Questions: 1) Doc types and volume (PDFs, Confluence, Notion)? 2) On-prem vector DB (Milvus) or managed (Pinecone)? Looking forward to potentially working together. Thanks, Faizan
$1,500 HKD in 7 days
5.0
5.0

With a diverse background in web, mobile, game development, and a specialization in AI Chatbots, I am well equipped to handle your Internal RAG Chatbot project. My Fluency in Python, Linux, and knowledge of software architecture makes me the ideal candidate for ensuring a smooth backend service that exposes clean REST endpoints. Moreover, my familiarity with FastAPI and Flask will help me adapt seamlessly to your language preference. Deeper into my repertoire, I’ve worked with numerous technologies including Java, Linux, and Python - all essential for implementing the core RAG workflow you're looking for. Pitch: Ultimately, my value to your project lies in my ability to not just churn out code but to build innovative solutions that address the real needs of an organization. The fact that you're open to iteration is a plus as it aligns with my philosophy of constant improvement through collaborative processes like prompt design and acceptance tests. With sample documents in hand and your clear vision for milestones, together we can create an Internal RAG Chatbot that's intelligent, secure, and highly functional: a perfect fit for your company's unique information management needs.
$1,900 HKD in 7 days
4.2
4.2

Hello there, I’ve built production-ready RAG chatbots behind firewalls using LangChain, LlamaIndex, and trusted vector stores. I’ll design a modular Python backend (FastAPI or Flask) that exposes clean REST endpoints for chat, document uploads, and admin tasks, with a secure, configurable RAG workflow that chunks, embeds, stores, and retrieves private data. The LLM layer will default to GPT-4 Turbo for accuracy, yet I’ll keep the codebase easily swappable to Qwen or ChatGLM for multilingual needs, all controlled via environment variables. On the tech side, I’ll integrate at least one vector store and one LLM provider, implement robust prompt engineering to keep answers concise, cited, and free of hallucinations, and add unit tests plus a minimal end‑to‑end proof (CLI or tiny HTML page). Optional front‑end (React or Vue) can be added to show chat history and streaming responses. I’ll tailor the setup to your knowledge base structure and documents once milestones are agreed. Please feel free to share sample documents and KB structure so we can lock milestones and acceptance tests. I am excited to collaborate and iterate on prompts and tests. Best regards, Billy Bryan
$2,110 HKD in 1 day
4.3
4.3

Hi there, Strong alignment with this project comes from experience building secure RAG-based chat systems with vector databases and LLM integrations for internal knowledge retrieval. Clear understanding of your requirement to develop a Python-based chatbot with document ingestion, embedding pipelines, and accurate, citation-based responses. Expertise with LangChain/LlamaIndex, FAISS/Pinecone, GPT-4 class models, and FastAPI ensures scalable, modular, and production-ready architecture. Approach focuses on clean API design, optimized retrieval pipelines, and prompt tuning to minimize hallucinations and improve answer quality. Available to start immediately happy to connect for a quick demo or discussion. Recent work: https://www.freelancer.com/u/chiragardeshna Regards Chirag
$1,000 HKD in 7 days
4.4
4.4

It is exhausting when teams waste time hunting for answers in scattered documents, especially when every minute spent searching costs productivity. Having a chatbot that can instantly fetch accurate product info, summarize files, and cite sources would save your team countless hours and eliminate guesswork. You can expect a production-ready internal chatbot that sits safely behind your firewall, answers product questions in real time, and keeps responses concise and trustworthy. Everything will be modular for easy updates and future multilingual support. First, I will set up the RAG pipeline using LangChain or LlamaIndex with secure document handling and vector storage. Next, I will build a Python backend with clean REST endpoints for chat, upload, and admin tools. Finally, I will tune prompts for accuracy and deliver a simple interface to prove the flow end to end. What kind of internal documents or knowledge base formats will the bot need to handle first?
$1,806 HKD in 7 days
4.4
4.4

Hi There!!! ★★★★ ( Production-ready private RAG chatbot with secure internal knowledge access ) ★★★★ Project understanding: You need a secure, firewall-protected internal chatbot built using a RAG architecture. It should use LangChain/LlamaIndex with a vector database (Pinecone/Milvus/FAISS), support document ingestion, chat queries, and summarisation of internal files, with GPT-4 Turbo as default and modular LLM switching. Services ⚜ Build FastAPI/Flask backend with REST endpoints ⚜ Implement full RAG pipeline (chunking, embedding, retrieval) ⚜ Integrate vector DB (FAISS/Pinecone/Milvus) securely ⚜ GPT-4 Turbo integration with swap-ready LLM layer ⚜ Prompt tuning for accurate, cited responses ⚜ Document upload + indexing workflow ⚜ Unit tests + simple CLI or web demo interface I have hands-on experience building LLM-based systems and RAG pipelines using Python, LangChain and vector databases. I’ve worked on similar AI search and document Q&A systems where accuracy, security, and structured responses were critical. My approach is to first design clean data flow (ingestion → embeddings → retrieval → generation), then build modular APIs so you can easily extend or swap models later without breaking core logic. I can start quickly and iterate with you on prompt quality and evaluation tests. Warm Regards, Farhin B.
$880 HKD in 10 days
4.3
4.3

Adelaide, Hong Kong
Member since Jun 23, 2014
$80-240 HKD
$30-250 AUD
₹600-1500 INR
₹600-1500 INR
$10-30 USD
$5000-10000 AUD
₹1500-12500 INR
$8-15 USD / hour
$30-250 USD
₹75000-150000 INR
₹75000-150000 INR
₹750-1250 INR / hour
₹12500-37500 INR
₹1500-12500 INR
₹1500-12500 INR
$10000-20000 USD
₹12500-37500 INR
₹37500-75000 INR
$8-15 USD / hour
₹1500-12500 INR
₹12500-37500 INR