A Chartio developer works with Chartio, a powerful business intelligence tool that provides intuitive and interactive dashboards for data visualization and analytics. They design, build, and maintain data models, create customized charts and reports, and integrate various data sources to meet business needs. They collaborate with stakeholders to understand data requirements, troubleshoot issues, and ensure data accuracy. They also optimize SQL queries and scripts to improve performance. Their role is crucial in empowering businesses to make informed decisions based on real-time, visual data insights.