A Data Streaming Developer designs and implements real-time data processing architectures. They use technologies such as Apache Kafka, Spark Streaming, or AWS Kinesis to ingest, process, and distribute data in real-time. Their tasks include tuning performance, ensuring data quality, and managing data retention policies. They also handle data integration from various sources, transforming and storing it in a way that supports business needs. Additionally, they troubleshoot issues, provide technical support, and collaborate with other teams to develop solutions. Understanding both the technical aspects and the business implications of data streaming is crucial for their role.