I use Postman because is good to test api, and request of your backend. and is available to make mock to your front request endpoint
I use MySQL because
I use GitLab because is good service for git repositories and has good quality services as free.
I use ES6 because
I use Angular 2 because is one the best framework to develop web single pages app. and has a good architecture with the view, style and controller of a component in diferent files.
I use React because
I use Visual Studio Code because the best code editor of actuality and has a lot of plugins that you can use. with very good support to typescript.
I use PHP because
I use Node.js because