An AngularJS developer designs and implements user interfaces using AngularJS, a JavaScript-based open-source front-end web application framework. They are responsible for combining the art of design with programming, translating UI/UX designs to actual code. They also create modules and components and couple them together to build a robust web app. They work closely with back-end developers to integrate their code with the server-side APIs. A basic AngularJS developer ensures high performance of applications across platforms, and conducts performance tests. Finally, they also troubleshoot applications for errors and resolve any issues that occur.