Donald Heddes contributed to the SimplifyJobs/Summer2025-Internships repository by focusing on data curation and user experience improvements. He addressed a bug affecting the accuracy of 'days ago' counts in job listings, ensuring consistent and reliable display of posting dates for users. His work involved careful review and correction of Markdown-based data, emphasizing data integrity across multiple entries. Additionally, Donald enhanced the visual presentation of the Samsung Memory Solution Research Engineer listing by applying a title emoji, aligning with branding goals. While the scope was targeted, his contributions demonstrated attention to detail in both data quality and user interface polish within the project.