My keyboard layout consist of three parts:

• JSON file for Karabiner-Elements located at ~/.config/karabiner/karabiner.json;
• HotKey keyboard shortcuts to launching and fast switching between applications;
• and bundle file which contains english and russion keylayout for macOS located at ~/Library/Keyboard Layouts.

HotKey shortcuts (hyper as a leader key):

• f — browser;
• d — Sublime Text;
• s — terminal;
• a — Spotlight;
• e — Emacs;
• g — Finder.

Layout scheme on keyboard-layout-editor.com

Based on Tonsky's Universal Layout