Einar Rocha contributed to the JU-DEV-Bootcamps/ERAS-BE and ERAS-FE repositories by delivering seven features over two months, focusing on developer onboarding, data integrity, and reporting accuracy. He enhanced backend security and data validation using C# and SQL, introducing custom validation attributes and refining import workflows to prevent data duplication. Einar improved developer experience by updating Docker-based environment setup and documentation. On the frontend, he used Angular and TypeScript to implement position-based data modeling, enabling precise filtering in heatmaps and reports. His work demonstrated depth in API integration, database migration, and code refactoring, resulting in more maintainable and reliable systems.