Telegram Automation Setup with n8n

I need an experienced developer to set up Telegram automation using n8n.

Key tasks include:
- Configure an AI-based Telegram agent in n8n
- Create a new Excel template for:
- Reading group lists
- Posting text, images, videos, and links
- Post 5–15 random messages per hour to up to 200 Telegram groups daily
- Log post status back to Excel
- Automatically skip or deactivate problematic groups
- Ensure continuous posting to active groups

Ideal candidates will have:
- Experience with Telegram bots and n8n
- Proficiency in Excel automation
- Strong error handling and group management skills

Please share similar project experience and estimated timeline.