I am looking for an expert developer or agency to build a sophisticated Telegram Sales Bot that functions as a global marketplace platform. The bot will connect international customers with manufacturers via Telegram. The core of the experience should be a seamless blend of Conversational AI (customer support/sales) and a Telegram Mini App (TMA) (product browsing/checkout). Key Requirements & Features 1. Conversational AI (The Sales Agent): Multilingual Support: The AI must automatically detect the user's language and respond in their native tongue. Knowledge Retrieval (RAG): The AI must answer questions based strictly on a provided knowledge base (Product specs, quality details, logistics, shipping times from e.g. China, customs info). Persona: Professional, helpful, and sales-oriented. 2. Telegram Mini App (The Customer-Touchpoint (Frontend)): A built-in web view (TMA) where users can browse products. Dynamic Catalog: Must sync with a backend (Airtable, Shopify, or a custom Database) to show real-time stock, images, and descriptions. Search & Filter: Users should be able to filter by category, price, and specifications. 3. Backend & Logistics: Product Management: A simple interface for me to upload/edit product details and high-quality images. Global Logistics Engine: The bot must calculate shipping times/costs based on the user's location (Global shipping from e.g. China). 4. Payments & Checkout: Integration of Telegram Payments API (e.g. Paypal, etc.) to support global credit cards and local payment methods. Automated order confirmation sent to both me and the customer. 5. Tech Stack Preference: Open to suggestions, but leaning towards: Python (python-telegram-bot), Node.js, or high-end No-Code setups (e.g., Make.com + OpenAI API + Supabase). The AI should ideally use Cloude or a similar LLM with RAG implementation. Deliverables: Fully functional Telegram Bot & Mini App. Backend dashboard for product and order management. Documentation on how to update the AI's knowledge base.