Worked on the tf-nira/pre-registration-ui and tf-nira/registration-client repositories, focusing on targeted improvements to user experience and backend robustness. Addressed a confusing payment acknowledgment prompt in the pre-registration UI by refining Angular front-end logic, ensuring the popup only appears when payment is required. In the registration-client project, enhanced PRN validation by introducing a wrapper DTO for service responses, improving error handling and user feedback across multiple verification paths. Resolved a Maven build failure to restore CI reliability. Leveraged TypeScript, Java, and API integration skills to deliver maintainable solutions that clarified user flows and strengthened backend service resilience.