Strings & Scrapers
One the first sites that I worked on was The Ukulele Site. Before working on the frontend development, I was tasked with writing a web scraper (something I hadn't done before) to fetch all the existing data about the company's products off a site that the client no longer had access to. I used Scrapy (a Python library) to do it and saved the team a huge chunk of data entry time. This was one of the first custom themes I worked on and where I learned PHP alongside Magento's templating system