Yoda Response: Developed a complex data pipeline, I have, for a media monitoring platform. Using GCP services, we did, such as Google Cloud Pub/Sub for data ingestion and Dataflow for processing. Key challenges faced, we did, with handling petabytes of data and ensuring low-latency processing. Overcame these challenges by optimizing data partitioning and using autoscaling features of GCP, we did. Also, implemented robust error handling and monitoring to quickly detect and resolve issues. Ensured data security with IAM roles and end-to-end encryption, we did.