Linux and Unix system administration all flavours, networking, firewalls, Apache, Nginx, web serving, reverse proxying, caching, load balancing, media streaming, hosting, openstack, clouds and email IMAP, POP3, and SMTP servers.. Everything.
Development Expert- Native javascript (ES6), node.js, jQuery, Angular, React, native javascript, HTML5, CSS3 including flex and grid layouts. Full stack development using javascript and build and or manage REST APIs and graphQL.