Custom Telegram Auto-Response Bot

I need a Telegram bot that sends standalone auto-messages based on keywords in incoming texts. The messages should not appear as replies, but as independent messages.

Key Requirements:
- Auto messages triggered by predefined keywords.
- Customizable responses for different keywords.
- Ability to use my predefined keywords and responses.

Ideal Skills and Experience:
- Experience with Telegram bot development.
- Proficiency in handling keyword-based message triggers.
- Familiarity with creating standalone messages in chat platforms.
- Strong coding skills, preferably in Python or a similar language.

Please provide examples of similar work done and an estimated timeline.