Worked on the Tietokilta/web repository to enhance the reliability of external API integrations, specifically focusing on error handling for the Laskugeneraattori service. Addressed a bug by introducing an ErrorResponse interface and a tryParse function in TypeScript, enabling robust parsing of JSON error responses. This approach ensured that structured error data from the external API was consistently captured and reported, reducing investigation time and streamlining debugging processes. The work maintained alignment with existing code quality standards and minimized risk to current functionality. Core skills applied included API integration, error handling, and TypeScript development, with an emphasis on maintainable, incremental improvements.