Litissia Hadjout developed end-to-end investor portfolio capabilities for the scpi-invest-plus-api and scpi-invest-plus-front repositories, enabling authenticated investors to view consolidated investment data. She implemented investment retrieval using Java, Spring Boot, and SQL, introducing a new DTO, property type enum, and centralized service logic to improve maintainability and reduce coupling. On the frontend, she delivered a portfolio feature in Angular and TypeScript, adding new routes and interfaces for seamless data integration. In April, she standardized investment statuses and introduced a scheduled-payment option, enhancing data integrity and payment flexibility. Her work demonstrated depth in backend architecture, database management, and API integration.