Worked on the aws/aws-sdk-cpp repository to improve the reliability of the STS Credentials Provider by extending the expiration grace period from five seconds to five minutes. This adjustment addressed issues with premature token expiration in queued-request scenarios, reducing credential retrieval failures for downstream services and aligning the implementation with AWS best practices. The solution was implemented in C++ using the AWS SDK, with a focus on authentication and configuration management. By enhancing the credentials lifecycle, the work contributed to greater stability and trust in credential management for deployments relying on the AWS SDK during May 2025, addressing a critical reliability concern.