SPA development in JavaScript/TypeScript with Angular 7+. Reactive programming using RxJS. Integration to backend services using WebSockets/SignalR. Unit tests implementation using Jasmine. Implementation of end-to-end tests by using Protractor framework. Knowledge on CSS3 at JavaScript developer level. I am used to working in the NodeJS ecosystem and supporting tools such us NPM.
Other libraries that I have used at a small scale include: ReactJS, GatsbyJS, Ionic and React Native.