Lasse worked on the ErasmusEgalitarian/educado-mobile repository, focusing on stabilizing certificate workflows and improving code quality through targeted bug fixes and refactoring. He enhanced backend reliability by restructuring certificate generation services, removing circular dependencies, and adding robust input validation and error logging using JavaScript and Node.js. On the frontend, he addressed UI consistency and improved date handling with React Native, while also resolving import issues to ensure correct service integration. Lasse contributed to modularizing the project structure, enabling per-package dependency management, and improved documentation for developer onboarding. His work emphasized maintainability, risk reduction, and seamless integration across the stack.