Necessary knowledge, which includes at least some experience with all of them:
- Angular 8+
- Nodejs
- GraphQL (Apollo for Angular for example)
- Sass
- Git & Git Flow
- Shell scripting
- Continuous deployment (Not necessarily Jenkins, but something like CircleCI is acceptable)
- Webpack
- Typescript for NodeJS
- Babel (for being used alongside typescript and webpack in Nodejs)
- Read and write specifications and requirements in English
Exciting Extras which would give you leverage:
- Conversational English
- Auth0 or similar (i.e. Authy)
- OAuth
- DevOps (Docker, Kubernetes, Swarm...)
- Serverless framework or Lambda function implementation
- Analytics tracking implementation (firebase, heat maps, Facebook Javascript SDK, others)