During January 2025, Piotr Kaleksandrowicz developed a foundational user authentication system for the Newbies-Workplace/gnome-app repository. He architected a modular authentication flow using NestJS and Prisma, introducing a dedicated User model and integrating both AuthModule and UsersModule to centralize identity management. The system enables secure sign-in via Google OAuth and protects API endpoints with JWT-based authentication, establishing a scalable baseline for future access controls. By leveraging TypeScript and Docker, Piotr ensured maintainability and ease of onboarding for new developers. His work addressed core security needs, laying the groundwork for robust identity features without reported bugs during the development period.