Worked on maplibre-gl-js to enhance reliability and rendering fidelity for globe interactions and font rendering using TypeScript and front end development skills. Addressed a camera stability issue by refining the zoom and center recalculation logic, which eliminated camera jumps during globe dragging with terrain at low pitch and preserved elevation data. Improved font rendering by optimizing TinySDF font loading, ensuring web fonts were fully loaded before instantiation and adding per-font load memoization. All changes were supported by comprehensive unit and regression tests, with updates to test hygiene and CI processes, resulting in smoother user experiences and reduced support overhead.