Harsh Sharma worked on backend development and file management for the 0chain/gosdk repository, focusing on stabilizing file path consensus within the SDK. He addressed a critical bug by refactoring the getMultipleFileConsensusFromBlobbers function to use the file meta hash for path hash initialization, which resolved issues with empty path hashes and inconsistent file references across blobbers. His approach improved data integrity and reliability in file path resolution, reducing potential runtime errors for applications relying on the SDK. Harsh applied his Go programming expertise to targeted debugging and refactoring, demonstrating depth in backend systems and attention to robust data handling practices.