Worked on the schubergphilis/terraform-aws-mcaf-s3 repository to enhance AWS S3 bucket lifecycle management by introducing a new parameter for transition_default_minimum_object_size. Leveraged Terraform and HCL to add this configurable variable, integrating it directly into the lifecycle resource to automate object transitions based on size. Implemented robust validation logic to enforce predefined values, reducing the risk of misconfiguration and supporting clear governance requirements. Focused on code quality by addressing Terraform formatting issues and tightening configuration correctness. The work delivered an end-to-end feature that improves lifecycle automation and maintainability for cloud infrastructure, demonstrating strong skills in AWS and infrastructure as code.