Experienced Ai/Nlp Developer for Web Application with Llm Integration

I am looking for an experienced ai/nlp developer to build a web application that leverages natural language processing (nlp) and large language models (llms) to process and understand human language. The project requires the development of an NLP-powered application using Python, integrating modern LLMs such as OpenAI GPT, Llama, Gemini, or similar. Key features to implement include Text classification, Sentiment analysis, Named Entity Recognition (NER), Text summarization, Question answering, Semantic search, and Conversational AI (chatbot). The backend should utilize REST APIs built with FastAPI or Flask, and data storage will be handled using PostgreSQL or MongoDB. A simple, responsive frontend is required, with React or Next.js preferred. The application will be deployed on cloud platforms like AWS, Azure, GCP, or Docker. Deliverables include complete source code, API documentation, a deployment guide, and well-documented, maintainable code with testing before delivery. Please include examples of previous nlp, ai, or llm-based projects in your proposal, along with your estimated timeline and budget.