Mario Ottone contributed to backend development and release management across multiple PagoPA repositories, including pn-ec, pn-pdfraster, and pn-mandate. In pn-ec and pn-pdfraster, he synchronized release versioning and metadata using Java and YAML, improving traceability and reducing deployment risk without introducing functional changes. Later, in pn-mandate, Mario focused on security and maintainability by fixing CIE validation logic, refactoring SOD byte processing, and updating test configurations. His work leveraged skills in cryptography, digital signatures, and DevOps, resulting in more robust credential handling, cleaner CI pipelines, and a foundation for consistent, reliable releases and ongoing codebase maintainability.