Joona Karkkainen worked on the Tietokilta/web repository, focusing on improving branding consistency across the platform’s newsletters and category fields. Using React and TypeScript, Joona delivered a targeted feature that standardized the capitalization of 'Ayy' to 'AYY' throughout both user-facing content and internal code paths. This change was implemented in a single, traceable commit, ensuring that branding remained uniform and reducing the likelihood of presentation inconsistencies in the future. While the scope of work was narrow, Joona’s approach addressed a specific need for marketing alignment and positioned the codebase for easier future updates related to branding standards.