Worked on enhancing the firebase/firebase-functions repository by implementing Node.js 22 compatibility and improving ES module support for serverless functions. Addressed the challenge of top-level await in ES modules by updating the module loader to use await import instead of require, ensuring reliable execution with newer Node.js runtimes. Updated the continuous integration matrix to include Node.js 22, and revised tests and documentation to reflect these changes. Utilized JavaScript, TypeScript, and YAML to deliver these backend improvements, focusing on CI/CD workflows and ES module handling. The work resulted in smoother deployment and execution of serverless functions across modern Node.js environments.