Multi-modal Chat & Predictive Database Model

I need a robust Rag-based model that can handle a database storing mixed data - both textual and numerical. This model should be capable of supporting a chat functionality that includes both text and voice communication.

Key Features:
- A comprehensive database that can accommodate mixed data types
- Text and Voice chat capabilities
- A predictive model that includes:
- A recommendation system
- Sentiment analysis
- Trend forecasting

Ideal Skills:
- Proficiency in database management
- Experience with Rag-based models
- Expertise in developing chat functionalities
- Knowledge in predictive modelling
- Familiarity with mixed data types

I am looking for a professional who can deliver a high-quality, reliable model. Please include samples of your previous work in your bid.