power user

(computing) A person who makes heavy use of computers, running many applications and capable of using advanced functionality.

Japanese Meaning

高度な機能を駆使できるコンピュータの利用者、すなわち多くのアプリケーションを同時に使いこなし、コンピュータを積極的に活用する上級ユーザ

As a power user, she customized her development environment with dozens of plugins and automated scripts.

上級ユーザーとして、彼女は何十ものプラグインと自動化スクリプトで開発環境をカスタマイズした。

Sense（1）

(computing) A person who makes heavy use of computers, running many applications and capable of using advanced functionality.

Coordinate term: ubergeek

Sense（2）

(computing) A computer user who seeks and uses products having the most features and the fastest performance.

power users

（ plural ）