Text Data Scraping from Dynamic Websites

I'm in need of a skilled data scraper to extract text data from various dynamic websites. These sites use AJAX content, so experience in handling such platforms is crucial.

Key Requirements:
- Proficient in web scraping techniques and tools
- Familiarity with dynamic websites and AJAX content
- Ability to handle and scrape data from websites requiring login/authentication
- Strong understanding of data processing and cleaning

Ideal Skills:
- Proficiency in programming languages like Python or R
- Experience with data scraping libraries such as Beautiful Soup, Scrapy or Selenium
- Knowledge of handling CAPTCHAs and other anti-scraping measures
- Familiarity with data visualization tools

The goal is to gather large amounts of text data for analysis. Please share your previous experience in similar projects and your proposed approach.