During April 2025, Oliver contributed to the umap-project/umap repository by developing an environment-driven configuration for CSRF trusted origins, enhancing security and simplifying deployment management. He implemented a Python-based solution that reads trusted origins from environment variables, allowing per-deployment customization and reducing manual configuration overhead. This backend development work centralized CSRF protection settings, making deployments safer and more consistent across environments. In addition to the security feature, Oliver improved code formatting throughout the project to maintain readability and adherence to coding standards. His efforts focused on backend development, configuration management, and code quality, demonstrating a methodical approach to engineering challenges.