Henri Remonen contributed to the UniversityOfHelsinkiCS/palaute and sis-importer repositories by building granular access control systems and enhancing study-tracking features. He consolidated user permissions into a unified access model, enabling more precise data governance and filtering student data by access status. Henri improved the My Teaching UI with dynamic course ordering and updated labels, while also integrating curriculum period data into study-tracking endpoints using Sequelize and PostgreSQL. His work included refactoring legacy code, optimizing database queries, and strengthening error monitoring with Sentry. Throughout, Henri focused on maintainability and test hygiene, ensuring scalable backend operations and a more robust developer experience.