You can find a detailed list of job portals at Career Services University of Zurich:
Students seeking jobs, internships or graduate positions have the best chances to find current vacancies by paying a visit to the employment agency, the job platform of University of Zurich (Arbeitsvermittlung der Universität Zürich); or by checking the billboards at Rämistrasse 62, Kiosk Zentrum or Student Shop Irchel. Furthermore, students looking for jobs can submit their application online and present themselves to interested companies.
Student Employment Agency
Besides numerous other things offered or sought there are often good spare-time jobs to be found in the marketplace.
The electronic job bourse of the assistants' association and the association for students undergoing doctoral studies at the ETH Zurich (AVETH) and Lausanne (ACIDE).
Situations vacant through the Swiss Banking Institute
Internet job bourse of the University of Zurich‘s personnel department.
The student association uniboard Zurich runs on their website uniboard.ch an online-forum «My Career» with job offers for students.
uniboard.ch My Career