Worked on the penpot/penpot repository to enhance the reliability of AWS S3 interactions by unifying credential resolution between S3Client and S3Presigner. Addressed a critical bug by refactoring the backend Clojure code to ensure both components use an identical approach for credential handling, reducing divergence and simplifying the debugging process. Leveraged expertise in AWS SDK and backend development to align the behavior of client and presigner components, resulting in more predictable and consistent S3 operation outcomes. This targeted improvement focused on backend infrastructure, delivering a durable solution for cloud workflows without introducing new features during the development period.