I was given the task of making a complex component with nested tree stucture to support drag and drop feature. At the same time, add custom list item in which we can further add nested elements. Whole stuff was so complex with too many restraints but I amanged to pull it off with some serious thinking and a bit of CSS help.

Implemented a fully functional drag and drop feature inn the existing codebase using react-dnd library. It included re-arranging items, including all the conditions and edge cases.

Working on a 4 internal websites of Amazon with complex filtering based on location. Integrating user data in CMS and handling complex flows in Javascript.