During July 2025, Harold focused on backend development and image processing by addressing a critical bug in the girder/large_image repository. He implemented a targeted fix in Python to the large-image tiling pipeline, resolving an issue where tile padding did not properly account for both expected and actual tile dimensions. This patch ensures that tiles are consistently padded, preventing data loss and misalignment, especially in edge cases. By improving the robustness of the tiling workflow, Harold enhanced the reliability of downstream rendering processes. His work demonstrated a careful, low-risk engineering approach, contributing measurable stability to a core image processing component.