Dynamic Web Scraper for Spreadsheet

I need a web scraper that can gather relevant information from a site with dynamic JavaScript content and populate a pre-designed spreadsheet. The frequency of the scraping can be discussed.

Requirements:
- Ability to handle dynamic content (JavaScript)
- Populate a pre-designed spreadsheet with the gathered information
- Flexible running schedule

Ideal Skills and Experience:
- Proficiency in web scraping tools and frameworks
- Experience with JavaScript-rendered content
- Familiarity with spreadsheet manipulation and automation
- Python, BeautifulSoup, Scrapy, or similar expertise