During October 2025, this developer enhanced the aws/aws-lambda-dotnet repository by introducing NotResource support to the APIGatewayCustomAuthorizerPolicy, enabling users to explicitly exclude resources from custom authorizer IAM policies. Working primarily with C# and leveraging AWS Lambda and IAM policy management, the implementation focused on improving security posture and policy precision for serverless applications using API Gateway custom authorizers. By adding the NotResource field, the developer enabled more granular access control, reducing the risk of over-permissive policies and aligning with IAM best practices. The work demonstrated a strong understanding of backend development and cloud security requirements within AWS environments.