Gutenberg is a really robust and active project[1] in its own right, separate from WordPress, and I hope that it becomes a cross-CMS standard.

If you've worked on any sort of editor, block system, page builder, etc Automattic are hiring very aggressively for senior JS positions. [2] It's a fun and fast-moving project to work on, with a huge impact. Many others are hiring for Gutenberg skills as well, so it's a high-demand competency.

[1] https://github.com/WordPress/gutenberg [2] https://automattic.com/work-with-us/javascript-engineer/