A power user is a user of computers, software and other electronic devices, who uses advanced features of computer hardware,[1][2][3] operating systems,[4] programs, or websites[5] which are not used by the average user. A power user might not have extensive technical knowledge of the systems they use[6] but is rather characterized by competence or desire to make the most intensive use of computer programs or systems.
Power user!
https://en.m.wikipedia.org/wiki/Power_user