Worked on the TanStack/query repository to deliver a critical server-side rendering hydration fix for Infinite Query, addressing stability issues in the hydration process. The solution involved refactoring the query architecture by storing the query type directly on the Query object using a dedicated marker, ensuring that infinite query logic is consistently applied during hydration. Implemented comprehensive end-to-end regression tests to validate the SSR to hydration workflow and coordinated updates to continuous integration pipelines. Leveraged TypeScript and front end development skills to improve type safety, maintainability, and reliability of the hydration path, resulting in clearer code and reduced hydration-related regressions.