Joe Rivett worked on standardizing and enhancing the configurability of charting components in the factorialco/factorial-one repository. He unified chart properties across all chart types, allowing developers to hide tooltips and grids through a single configuration and ensuring the domain property is consistently passed to recharts. Using React and TypeScript, Joe focused on improving the maintainability and consistency of the UI component layer, aligning the charting API with the broader design system to reduce downstream variance. This work stabilized the charting surface, reduced future maintenance overhead, and set a foundation for faster feature development, reflecting thoughtful engineering depth and clarity.