Proficiency in Vue3 and understanding its core principles Proficiency in HTML, CSS, and modern JavaScript Familiar with Web Components Understanding of RESTful APIs and web service integration Proficiency in Vue related components, e.g. Vuex, vue-router Proficiency in React and understanding of its core principles Experience in popular React workflows (such as Flux or Redux) Familiar with recent specifications of EcmaScript Experience in data structure libraries (e.g., Immutable.js) Familiar with modern front-end build pipelines and tools Experience in common front-end development tools such as Babel, Webpack, NPM, etc Experience in Jest, popular e2e tool Knowledge of isomorphic React is a plus