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We are seeking an expert Full-Stack AI Engineer to architect and build a scalable, proprietary AI application from the ground up. You will be responsible for developing a highly responsive [login to view URL] frontend integrated with a high-performance Python backend (FastAPI preferred for async/streaming, or Django). The core of this product relies on a custom Retrieval-Augmented Generation (RAG) system built with Langchain to securely and intelligently query complex datasets. If you have a proven track record of bridging advanced AI data pipelines with production-ready APIs and intuitive UI/UX, we want to hear from you. Required Technical Skills Frontend: [login to view URL], React, and modern UI frameworks (Tailwind CSS, etc.). Backend: Python, FastAPI or Django/DRF, PostgreSQL. Async & Streaming: Experience with Celery/Redis for background tasks and Server-Sent Events (SSE) or WebSockets for streaming LLM responses. AI/LLM Frameworks: Langchain, LlamaIndex, and commercial/open-source LLM integration. RAG & Data Architecture: Vector Databases (pgvector, Pinecone, ChromaDB, Qdrant), custom embedding generation, and advanced document chunking strategies. DevOps: Docker, AWS/GCP/Azure, and Vercel deployment. Deliverables & Milestones Milestone 1 (Scoping & Technical Architecture): Deliver a comprehensive technical specification detailing the database schema, API design, RAG architecture, and deployment strategy to get started. Milestone 2 (Backend & AI Core): Set up the FastAPI/Django backend, configure the vector database, process initial data, and build the Langchain RAG API endpoints. Milestone 3 (Frontend & MVP): Build the [login to view URL] frontend, connect the backend APIs (ensuring smooth token streaming for LLM responses), and deliver a functional end-to-end prototype. Milestone 4 (Optimization & Deployment): Optimize retrieval latency, stress-test the RAG system to minimize hallucinations, refine the UI, and deploy to a production environment.
Project ID: 40600752
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Hi Bibek, As already discussed with you last week, I am ready to start and have almost completed the documentation in parts. Building on our conversation and the project details, I am fully prepared to architect and develop this end to end proprietary AI application. The tech stack we outlined includes [login to view URL] for a highly responsive frontend, paired with FastAPI (optimized for async Server Sent Events to handle streaming LLM responses natively), and Langchain for the RAG pipeline. This is exactly what is needed to build a scalable and production ready product. Regards, Amit Gupta
$60 USD in 29 days
5.5
5.5
66 freelancers are bidding on average $131 USD for this job

Hello, I can architect and develop a scalable, proprietary AI application from the ground up. Message me to discuss more details about the project. I am excited to collaborate with you, Fahad.
$100 USD in 1 day
5.7
5.7

I'm Gaurav and I am thrilled at the prospect of building a comprehensive, proprietary AI application with you. Over the years, my team and I have undertaken complex projects such as these with unwavering success. Our extensive experience with FastAPI, Django, and Python will empower us to architect a highly responsive backend for your app that'll integrate seamlessly with your chosen frontend technology - Next.js. We understand the impact of real-time data streaming on an AI system and are confident in handling technologies such as Celery/Redis, SSE, and WebSockets to ensure smooth communication between your database and retrieval-augmented generation (RAG) system. Moreover, our hands-on experience with Langchain will give us an added advantage in efficiently managing your complex datasets and employing secure vector databases like pgvector, Pinecone, ChromaDB, Qdrant. We grasp the need for clean code and optimized performance - we know how crucial it is for a production-ready application. That’s why we emphasize efficiency during the development process without any compromise on reliability or scalability. Docker experience coupled with our proficiency in leading cloud platforms like AWS, GCP, and Azure will enable us to churn out robust architecture that guarantees optimal functionality while maintaining utmost security. Our multi-platform deployment experience will help us offer end-to-end solutions without any hassle.
$140 USD in 7 days
4.7
4.7

I am an expert full stack AI engineer specializing in building proprietary applications using the exact stack requested for your project. I have extensive experience architecting RAG pipelines using LangChain, Python, and FastAPI to deliver precise AI responses based on custom datasets. My background includes building high performance frontends with Next. js and managing production deployments on AWS with PostgreSQL databases. I have successfully integrated vector stores and optimized retrieval mechanisms to ensure low latency and high accuracy in AI applications. I am confident I can build a scalable and robust solution for the Project for Amit Gupta. I would like to discuss your specific architectural requirements and data sources. When are you available for a brief technical call?
$90 USD in 3 days
2.9
2.9

We are confident in our ability to successfully complete this project. If you give us the opportunity to work on it, we will do our best to deliver a high-quality solution as quickly as possible.
$120 USD in 7 days
0.0
0.0

Hi there, Building an AI application is not just about connecting an LLM to a frontend. The real challenge is creating a RAG pipeline that delivers accurate responses. Fast retrieval. And reliable performance as the knowledge base grows. My experience includes developing AI powered backend systems with FastAPI. LangChain. RAG pipelines. Azure OpenAI. PostgreSQL. And AWS cloud services. I have built secure REST APIs. Document processing workflows. ETL pipelines. And scalable backend architectures. The solution can include FastAPI with asynchronous APIs. pgvector or Pinecone for vector search. Background processing with Celery and Redis. Streaming responses through Server Sent Events. And a modular architecture that supports future AI features without major changes. My background combines AI integration with enterprise backend engineering which helps deliver production ready systems that are secure. Scalable. And easy to maintain. Designing the RAG architecture properly before development begins keeps retrieval accurate and reduces costly changes later. Best. Ali Ashraf
$140 USD in 7 days
0.0
0.0

Hello, Your project closely aligns with my experience in building AI-powered, production-ready SaaS applications using Python, FastAPI, Django, PostgreSQL, Redis, Docker, and AWS. Recently, I built BlueShore Technologies, an enterprise AI platform featuring an AI chatbot, CRM, visitor analytics, real-time dashboards, REST APIs, WebSocket communication, Docker deployment, PostgreSQL, and scalable backend architecture. This project demonstrates my ability to design, develop, and deploy complete AI-enabled business applications. For your project, I would follow a milestone-driven approach: Design the overall architecture, database schema, API structure, and RAG workflow. Build a scalable FastAPI backend with secure REST APIs and asynchronous processing. Integrate vector databases, LLM services, and retrieval pipelines for intelligent document querying. Connect the frontend with streaming AI responses, authentication, and responsive UI. Optimize performance, test thoroughly, and deploy to production using Docker and cloud infrastructure. I have strong experience with FastAPI, Django, REST APIs, PostgreSQL, Redis, Celery, Docker, AWS, and AI integrations. I write clean, maintainable code, communicate clearly, and deliver on time. I'd be happy to discuss your technical requirements and help build a scalable AI solution with long-term maintainability. Looking forward to working with you. Best regards, Yashvardhan Mishra
$120 USD in 20 days
0.0
0.0

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