I am comfortable with Python and MySQL. In my previous projects, I have used Python extensively for data manipulation and analysis. I utilized libraries like Pandas for cleaning and transforming data, and Matplotlib for creating visualizations to present insights. MySQL has been my go-to for managing and querying databases. I have written SQL queries to extract and aggregate data, which helped in preparing datasets for further analysis. These skills have been crucial in ensuring data accuracy and reliability in my data engineering tasks.