Core web fundamentals: HTML, JavaScript, and CSS
CSS precompilers like Sass and LESS
JavaScript frameworks with JS-based build tools like Grunt, Gulp, and Bower
Skills in one or more chosen frameworks/libraries like jQuery or Bootstrap
AJAX (Asynchronous JavaScript and XML)
Note: Advanced AngularJS developers will have a mix of front-end and back-end technology expertise, including solution stacks like MEAN, and server-side technologies like Node.js.