During May 2025, this developer delivered five features across two repositories, focusing on backend API development and project documentation. In giovanirojascuela/2025_5TO01, they implemented a Book API with full CRUD operations using Express.js and JavaScript, established a scaffold for a Country API with robust server setup and error handling, and integrated database-backed contact management with model and controller layers. They also consolidated onboarding materials and improved documentation clarity to streamline contributor experience. In giovanirojascuela/p02_ssh, they created a JavaScript fundamentals tutorial module, covering core syntax, module systems, and Node.js utilities, emphasizing foundational programming and maintainable code structure.