The recent programming languages which I have just learned are:
Python
Django.
I am a MEAN stack developer. Specifically in Angular and Node I have been working since last 4 years from now. Though the over all programming experience I have in other languages are of around 9 years.
I have good hold over asynchronous code - not only callbacks, but ability to design, write, structure and debug any asynchronous code : callbacks, pipelines/chains, promises/futures. It is the major one.
Also I have good amount of knowledge of eventEmitters, streams, processes work in node.js. This is fundamental node.js stuff, which makes node.js what it is.
Familiarity and basic understanding of Functional Programming JS toolset and FP approach.
Also I used closures, partial application, write pure, stateless code. Also I have a knowledge of advanced topics like : V8 engine, monitoring/preventing/solving memory leaks, writing efficient, performant, lousy-coupled, modular code.
When it comes to Angular at present I am currently working in Angular 4 and here are my responsibilities which I am performing in this language for my existing clients:
1. Delivering a complete front end application
2. Ensuring high performance on mobile and desktop
3. Writing tested, idiomatic, and documented JavaScript, HTML and CSS
4. Coordinating the workflow between the graphic designer, the HTML coder, and yourself
5. Cooperating with the back-end developer in the process of building the RESTful API