I Built the Same Data Pipeline 4 Ways. Here's What I'd Never Do Again.

Apache Airflow is an open-source data-driven analytics tool. It can be used to pull raw data from S3, clean it, join it against a customer dimension table, aggregate it into a revenue summary, and land it in the warehouse by 7 am. The company's analytics team needed a daily pipeline: pull raw event data, join against a slowly-changing table, and aggregate it to a daily summary.