Worked on backend enhancements for the pagopa/selfcare-external-api-backend and pagopa/selfcare-user repositories, focusing on reliability and test infrastructure. Addressed onboarding retrieval logic by ensuring the most recent onboarding instance is selected, encapsulating comparison logic within a dedicated utility. Expanded integration and API test coverage for user microservices, covering authentication, data retrieval, and deletion workflows. Improved test stability by refining data initialization and log management. Developed Azure Blob Storage test infrastructure using Azurite and Azure CLI to validate cloud storage integrations. Upgraded the Cucumber framework, aligned deployment ports, and updated OpenAPI documentation, leveraging Java, Docker, and Spring Boot throughout the process.