Simopekka Kerkelä developed language-aware content delivery and infrastructure management features across Opetushallitus/ludos and Opetushallitus/aoe. In ludos, he implemented dynamic conditional logic in React and TypeScript to display Finnish instructions for Suko assignments, improving localization and user experience for Finnish learners. For aoe, he managed ElastiCache version alignment across production, development, and QA environments using HCL and JSON, including safe rollbacks to maintain stability. He also refined multi-language error messaging and standardized environment configuration files for clarity and maintainability. His work demonstrated depth in backend and frontend development, configuration management, and infrastructure as code within complex, multi-environment systems.