When hire dedicated power bi developer, look for proficiency in data modeling, DAX (Data Analysis Expressions), and Power Query. They should have experience integrating various data sources, like SQL, Excel, and cloud platforms. Strong knowledge of dashboard design, user experience, and advanced analytics is crucial. Additionally, they should be well-versed in managing data security and scalability. Communication skills are vital, as they must collaborate with stakeholders to translate business needs into effective Power BI reports. A background in business intelligence (BI) and data-driven decision-making is also highly desirable.