data engineering , data warehouses , snowflake , Cassandra, Pyspark, PostgreSQL, Tableau, ELT, MySQL, User Stories, Power Bi, Requirement Management, Sql, Data Visualization, Databricks, MongoDB, Etl, Source-to-target mappings, Data-quality frameworks, Azure data engineering, Data transformations, Stakeholder communication, Data pipelines, Acceptance criteria, Product Owner Agile, Lakehouses, data models