temporary employee; temp
A worker hired for a limited period, often to cover seasonal demand or staff shortages. More formal than バイト or パート.
We are hiring temporary employees for the busy year-end period.
He worked as a temporary employee just for the summer.
アルバイト is a casual term for part-time or temporary work, often used by students. 臨時従業員 is more formal and typically refers to a temporary position within a company.
パート usually refers to a regular part-time position, often with fixed hours, whereas 臨時従業員 is explicitly temporary and may be for a short, defined period.
Compound of 臨時 (temporary, extraordinary) and 従業員 (employee).