Rajveer Singh enhanced the GSSoC24/Postman-Challenge repository by contributing a documentation feature focused on certificate completion tracking. He updated the add-your-certificate.md file using Markdown, adding a new entry that links both a LinkedIn profile and a certificate URL. This approach improves traceability and verification of individual achievements, supporting onboarding and developer education within the project. The work centered on clear, accessible documentation practices, leveraging skills in technical writing and version control. No bugs were addressed during this period, and the contribution was limited in scope but provided a stable, auditable record of accomplishment for future contributors and maintainers.