A BigQuery Developer is a data professional who specializes in working with Google BigQuery, a fully-managed, serverless data warehouse designed for handling and analyzing large datasets in real-time. They are proficient in SQL, the BigQuery API, and tools like Google Cloud SDK and Cloud Console to design, query, and optimize complex datasets and data pipelines. BigQuery developers work on tasks such as data ingestion, querying for insights, creating dashboards, managing data storage, and integrating with other Google Cloud services like Dataflow and Dataproc. Their expertise is essential for businesses leveraging BigQuery for scalable, fast, and cost-effective analytics on large datasets.