Install Doom Emacs and the linked config, and use Emacs with VSCode-esque keybindings and look-and-feel. Good for Emacs newbies with prior VSCode experience.
Fast coders know their languages, frameworks and tools like the back of their hand. They eat docs for breakfast, have a knack for memorizing it, and an even stronger knack for making sense of it.
Sounds like a job add at the Startup From Hell.
Fast is a subjective term. How would you quantify? LOC/hour ? Words per minute?
There is no such thing as a "fast coder". You could differentiate from "mostly beginner" and "somewhat experienced" but that's about it, and even that is subjective.
I find "coder" a demeaning term and prefer programmer or developer.
Do you know a programmer that recommends himself as a "fast coder" ?
(Other than a job starved dev, in a low income country, to a low budget - low quality dev shop ?)
As DHH says, the main factor of velocity is feature negotiation: shaving off the 20% of stuff that takes 80% of time.
Use something like Bundler, Maven, Pip, npm, sbt. For example bundler has the `$> bundler outdated` command that shows dependencies that have new versions.