Worked on the TanStack/virtual repository to address a critical issue affecting the stability of the masonry layout during viewport resizing. The solution involved implementing a lane assignment caching mechanism in TypeScript, ensuring that items remained consistently positioned even as the viewport changed. This approach included robust cleanup and recalculation logic to maintain layout integrity under dynamic conditions. By focusing on front end development and performance optimization, the work reduced layout jumps and render jitter, resulting in a smoother and more stable user experience. The changes directly improved perceived performance for end users interacting with dynamic, grid-based interfaces in the application.