A full-stack developer has knowledge and experience of working with stacks such as MEAN, MERN, and LAMP. But it is not compulsory that a full stack developer would be expert in all these stacks.

James Urquhart, CNET Blogger, posted Does cloud computing need LAMP? on May 23rd. In this post, he considered whether cloud computing needed the LAMP stack.

Nuttall said the LAMP stack (Linux, Apache, MySQL and PHP, Perl or Python) and “a lot of Java” are used for both the front and back ends of the system with a lot of code reusable between the ...

The LAMP combination also gives corporate customers more choice among vendors rather than going only with Microsoft. "More and more enterprises are going with the best-of-breed stack," Gerstel said.

You must have Helpdesk experience, understand the ISP environment, experience hosting control panels (cPanel and ISPConfig). You other tech tools should include Linux, UNIX, LAMP Stack, LEMP Stack, ...