Describe organizations or projects you have participated in and your role in them.

In Python projects, I participated as a developer and sometimes as a team lead. For example, in one project, I created a Flask web service for processing user data and integrating with external APIs. My role included writing server-side logic, optimizing database queries, and writing unit tests. In another project, I worked on automating data processing using pandas and numpy libraries, creating scripts for ETL processes. I also participated in code reviews and helped colleagues solve technical problems.