Worked on improving type handling reliability in the trinodb/trino repository by addressing a critical cache issue within the TypeSignatureTranslator component. Focused on preventing cache poisoning, the solution involved making the cache case-sensitive so that type signatures are stored and retrieved with their original casing. This technical approach ensured that downstream processes, such as type inference and query planning, could resolve types accurately without risk of incorrect matches. The work was implemented using Java and emphasized robust software development practices, including unit testing, to validate correctness. The fix enhanced the stability and correctness of type resolution across the codebase during the month.