Created a new tree test feature for Helio, a survey platform for product, design, and marketing research that is owned by Zurb. The new feature enables users to create a nested tree question, share the test with customers, and view reporting metrics. The project involved selecting and implementing a drag and drop library (Angular UI tree), recursive data manipulation, and custom styling and logic. Technologies used: Angular.js, JavaScript, Sass, Ruby, Yarn, Tippy.js, Chart.js, Angular UI Tree.