A developer is responsible for designing, developing, and implementing business intelligence solutions. They work with software to create data models, reports, and dashboards that provide insight into business operations. They analyze business requirements, design data structures, and develop SQL queries to extract and manipulate data. They also test and troubleshoot solutions, ensuring data accuracy and performance efficiency. Additionally, they collaborate with various stakeholders, provide training to users, and may also assist in decision-making processes by providing data-driven insights. Their ultimate goal is to enhance business efficiencies through the optimal use of tools.