Contributed to ONSdigital/design-system by modernizing the codebase and enhancing Nunjucks templating with a robust, language-agnostic array extension utility, complete with error handling and unit tests to ensure reliability. Improved code organization by relocating core functions and updating documentation for better maintainability. In ONSdigital/dis-wagtail, developed comprehensive charting features for statistical article pages, enabling multiple chart types and advanced configuration such as annotations and aspect ratios. Introduced a featured chart component to improve data visibility and user engagement. Leveraged JavaScript, Python, and Django, with a focus on frontend development, data visualization, and alignment with existing Wagtail patterns.