Experienced C# Developer for E-commerce Data Scraping, Analysis, and Profitability Tool

We are seeking an experienced C# developer to build a robust data extraction and analysis tool. This application will be crucial for our e-commerce operations, enabling us to gather competitive intelligence and optimize product profitability.

The primary functionalities of the tool will include:

1.  Web Scraping: The application must efficiently scrape detailed product information from various retail and cosmetics websites. Key data points to be extracted include product name, barcode, price, stock status, image URL, and category. The specific URLs will be provided upon project award.

2.  Online Marketplace Lookup: Following data extraction, the tool needs to automatically search each product's barcode on a designated online marketplace. It should then retrieve relevant listing details, such as the product's price and availability on that marketplace.

3.  Profitability Analysis: The system will compare the scraped retail prices with the retrieved marketplace prices. It will then calculate potential profitability based on custom settings, including commission rates, shipping costs, and other applicable fees. The tool should generate a ranked list of products by profitability.

4.  Data Storage: All extracted product data, marketplace match details, and profitability calculation results must be securely stored in an MSSQL database.

We require clean, well-structured C# code and a highly reliable scraping mechanism that can handle various website structures. While not mandatory, a simple user interface or admin panel to manage settings and view results would be a significant advantage.