Contact Detail Web Crawler Required

I need a web crawler to extract contact details from various websites. Initially, the focus will be on company websites and possibly other platforms, but specific platforms will be determined in the course of the project. The crawler should be adaptable and able to handle a variety of different site structures and types.

Ideal Skills and Experience:
- Proficient in Python or similar programming language
- Experience with web scraping
- Familiarity with data extraction tools
- Can work with structured and unstructured data
- Understands compliance and ethical considerations in data extraction.

Please provide examples of previous web crawling projects you have completed.