In addition to Power BI, Power BI developers should be proficient with other Microsoft tools such as Excel, for data manipulation, and SQL Server for database management. Experience with Azure services, including Azure Data Factory and Azure Synapse Analytics, helps integrate and process cloud data. Knowledge of Power Automate can assist in automating workflows connected to Power BI dashboards. Tools like Python or R for advanced analytics and data visualization libraries such as Plotly or Matplotlib may also enhance a Power BI developer’s toolkit.