Gabriel Morishita developed and deployed a new Worker4 service for the zanfranceschi/rinha-de-backend-2025 repository, focusing on backend development and containerization using Docker and YAML. He enhanced the system’s throughput and scalability by adding Worker4 to the docker-compose configuration, tuning resource limits, and integrating a KeyDB cache with unique instance identification. Gabriel also improved deployment reliability by configuring default and fallback payment processor URLs, ensuring resilient production workflows. To address development completeness, he included a previously omitted file, preventing build and runtime issues. His work streamlined infrastructure, reduced deployment risk, and supported more efficient development and testing cycles.