An AWS Big Data Engineer designs, builds, and maintains big data solutions on Amazon Web Services (AWS). They work with technologies like AWS Glue, Redshift, EMR, S3, and Lambda to process, analyze, and store large datasets. Their responsibilities include data pipeline development, optimizing data workflows, and ensuring scalability. They collaborate with data scientists, analysts, and developers to support business intelligence and machine learning initiatives. Strong knowledge of AWS services, SQL, Python, and big data frameworks like Apache Spark is essential for this role.