Worked on the scala/scala repository to deliver a type-safety refactor for the Ordering.min and Ordering.max methods, focusing on improving correctness when comparing subtypes and enabling safer generic usage. The approach involved allowing these methods to accept a subtype of T, which reduced type-related issues in comparisons and increased overall safety for backend development in Scala. Additionally, backported a variance tweak to align the behavior of Ordering.min and Ordering.max with upstream semantics, ensuring consistency across the Ordering API. The work demonstrated a strong command of Scala and backend engineering, with an emphasis on type safety and robust API design.