Developed and delivered a robust HttpClient Authorization and Retry Mechanism for the DEFRA/epr-prn-rep-exp-facade repository, focusing on enhancing the security and reliability of outbound API requests. The solution introduced a DelegatingHandler-based authorization flow in C#, ensuring proper authentication for each request, and implemented a Polly-based retry policy to handle transient errors gracefully. This work addressed a missing authorization handle, reducing the risk of failed requests due to improper setup, and aligned the API integration with production security requirements. The approach demonstrated strong skills in HttpClient configuration and resilience patterns, contributing to more robust and maintainable service interactions.