During October 2024, Andrzej Blazejuk focused on stabilizing numeric operations within the kamranahmedse/developer-roadmap repository, addressing reliability issues in percentage displays across dashboards. He delivered a targeted bug fix by refactoring the getPercentage function using TypeScript, ensuring robust handling of edge cases and consistent formatting of percentage outputs. This work improved the accuracy and reliability of metrics visualization for end users. Andrzej also enhanced code quality by refactoring number utilities, increasing their reusability and reducing the likelihood of edge-case failures. His contributions demonstrated depth in front end development and a strong command of TypeScript for utility function design.