In April 2025, Leo Gomez refactored the Koa middleware application for the dbos-inc/dbos-transact-ts repository, focusing on improving API reliability and predictability. He ensured middleware, including body parsers, was applied only once per request by attaching it directly to router verb methods, which reduced duplicate invocations. Leo also developed a new GET API endpoint and wrote tests in TypeScript and JavaScript to validate both endpoint behavior and middleware flow. His work addressed a bug that caused multiple middleware invocations, expanded test coverage, and updated documentation, demonstrating a methodical approach to backend development and API stability using Node.js and Koa.js.