Worked on the Yelp/paasta repository to refactor the deployment environment selection process within the service shard update flow. The approach replaced complex nested conditionals with an explicit mapping, making the logic for determining deployment environments more transparent and maintainable. This change, implemented in Python and leveraging DevOps and scripting skills, reduced the risk of misconfiguration and improved the clarity of the codebase. The refactor also enhanced auditability and made onboarding easier by providing a clearer structure for future environment additions. No major bugs were addressed during this period, with the primary focus on delivering this targeted feature improvement.