Comprehensive Telegram Member Scraper

I'm looking for a proficient developer to craft a highly efficient Telegram member scraper. This would be required to export usernames from both specific and general accessible groups on the Telegram platform. The harvested data will be saved to a .csv file for easy access and manipulation.

Key requirements for this project include:
* Versatile in working with .csv files
* Expertise in data scraping, specifically usernames
* Familiarity with the Telegram platform and how its groups function
* Ability to extract information from both specific and universal accessible groups

Your experience and skills around these areas will greatly contribute towards the successful completion of this task. Please share any relevant past projects or work you've done in this field. Now, let's work together to build this member scraper tool!