Build Full AI Assistant Platform (Telegram Bot + Web + PWA Mobile, GPT-4, CRM, Stripe)

I'm developing a full-featured AI assistant platform called “Shexsi Asistentim.” It will operate across Telegram (as a bot), Web (admin/user dashboard), and Mobile (PWA initially, later React Native).

Key modules include:
- GPT-4 Turbo for AI responses (text + voice)
- Speech-to-Text & Text-to-Speech for voice commands
- Task and reminder system (“remind me tomorrow at 3 PM” type of prompts)
- AI-generated content: text (posts, emails), images (via DALL·E), videos (RunwayML or similar)
- CRM module with WhatsApp Business API integration
- Admin + user panel with role/permission system
- Subscription and credit system via Stripe
- 10 modular AI agents (e.g. content, support, sales assistant)

The entire system should run from a shared backend and use APIs to connect all components.

I already have:
- Full technical brief (PDF)
- System diagram (on request)
- Pricing strategy and usage limits

You can work on the full project or specific parts. Please let me know your experience, what you can take on, your estimated timeline, and budget.

Looking forward to working with someone skilled and collaborative.