Over a two-month period, contributed to the UniversityOfHelsinkiCS/palaute and sis-importer repositories by delivering features and fixes focused on access control, data integration, and UI improvements. Enhanced backend systems using JavaScript and TypeScript, consolidating access rights into a unified model and enabling granular data filtering for study-tracking endpoints. Improved the My Teaching interface with dynamic course ordering and updated UI labels, while also integrating curriculum period data models using Sequelize and PostgreSQL. Addressed bugs related to permission checks, UI rendering, and data retrieval, and maintained code quality through refactoring, dependency management, and improved error monitoring with Sentry integration.