Contributed to the development and improvement of an e-commerce grocery platform with a local product dataset of approximately 17,900 items. Developed responsive interfaces for product browsing, order management, address selection, and delivery eligibility verification across desktop, tablet, and mobile devices. Worked on a Java/Spring Boot integration with Shopify to improve promotional campaign handling, price restoration, and product synchronization error reporting. Investigated a client-reported synchronization issue involving an internal product catalog and a third-party integration hu