Worked on enhancing tooltip functionality for dual-axis charts in the adobe/react-spectrum-charts repository, focusing on improving the accuracy and responsiveness of data representation. The approach involved refining the item tooltip logic, adjusting interaction modes, and recalibrating hover area calculations to better align tooltips with corresponding data points, especially in complex chart scenarios. Using React and TypeScript, the developer addressed edge cases that previously caused inconsistencies, resulting in a smoother and more intuitive user experience for developers and end users interacting with dual-axis charts. The work demonstrated a strong grasp of front end development principles and attention to detail in user interface behavior.