Worked on backend stability for the Immpression-Dev-Team/backend repository by addressing a critical connectivity issue between the main domain and the backend service. Focused on updating the server’s CORS configuration to allow requests from https://immpression.art, which restored reliable cross-origin communication and reduced frontend-backend errors. Utilized Node.js and Express.js to implement and validate the CORS policy changes, ensuring that the backend could securely interact with the main site. Demonstrated backend development skills through careful change management, clear commit documentation, and effective cross-team coordination, resulting in a smoother user experience and improved reliability for the platform’s core communication pathways.