During September 2025, João Lima focused on backend development for the wasmerio/pingora repository, addressing a critical issue affecting daemon-mode observability. Using Rust, he restored STDOUT and STDERR output when Pingora runs as a daemon without an error_log specified, ensuring that error logs remain visible for real-time debugging. This fix aligned the application’s behavior with its documentation and prevented silent failures caused by log redirection during daemonization. By validating the solution against Pingora’s expected daemonize behavior, João improved the reliability of debugging and incident resolution for daemon deployments, demonstrating depth in Rust and backend systems engineering within a short timeframe.