Jay contributed to the prisma/prisma-engines repository by implementing support for retrieving the last matching record in FindFirst queries through the Take::NegativeOne feature. This enhancement required updates to the query compiler and underlying query structure to correctly interpret and process negative take values, ensuring the API could handle new query semantics. Jay also developed and refined tests to validate both valid and invalid use cases, providing regression protection and robust guardrails. Working primarily with Rust, Jay applied skills in API development, backend development, and database querying. The work demonstrated focused depth in extending query capabilities within a complex backend system.