Customer Data Visualization via Google Looker

I am in need of an experienced ETL engineer who can extract customer data from our MongoDB and present it on our website through interactive dashboards using Google Looker.

Key Requirements:
- Extraction of relevant customer data such as demographics, purchase history, and behavioral insights.
- Creation of interactive dashboards that allow users to filter data and drill-down into specifics.

Ideal Skills and Experience:
- Proficiency with ETL processes and MongoDB.
- Experience with Google Looker or similar data visualization tools.
- Ability to create user-friendly, interactive dashboards.

Please provide examples of previous work with customer data and Google Looker in your proposal.