Which part of the pipeline did you write yourself?

Situation: In my last role, I was tasked with building a data pipeline for a marketing analytics platform. Task: I had to design and implement the entire ingestion and transformation process. Action: I wrote the extraction scripts for the CRM database, the file ingestion logic for the daily CSV drops, and the API client for the advertising platform. I also developed the transformation logic in Python using Pandas, and orchestrated the workflow with Airflow. I wrote unit tests and set up CI/CD for the pipeline code. Result: The pipeline processed 10 million records daily with a 99.9% success rate, and the dashboards were refreshed within 30 minutes of the nightly load, meeting the business requirement. My ownership of the entire pipeline earned me recognition from the product team and a promotion to senior data engineer.