Worked on the percona/percona-backup-mongodb repository to enhance backup reliability for S3-compatible storage backends. Focused on backend development and configuration management using Go, the developer addressed a critical issue where S3 paths could become empty or misformatted if the EndpointURL was not provided. By updating the Path() function to construct S3 paths using the bucket name in such cases, the solution reduced failure modes and improved backup integrity across AWS and other S3-compatible providers. The changes were thoroughly tested, reviewed, and merged through collaborative processes, resulting in clearer persistence behavior and fewer path-related errors in cloud storage workflows.