GCP BIQ Query Table Slack Chatbot

I'm looking to develop a text-based chatbot that will interact with users on Slack, providing information from my GCP BigQuery tables. The chatbot should answer simple queries, handle complex questions with drill-down options, and present data visualizations when needed. Instead of users directly querying BigQuery, they will interact with this chatbot.

Key Requirements:
- Development of a text-based Slack chatbot.
- Capable of simple query response and handling complex queries with drill-down options.
- Able to present data visualizations.

Ideal Skills:
- Experience in chatbot development, particularly for Slack.
- Proficiency in working with GCP BigQuery.
- Skills in data visualization and making complex data understandable.