Work visas are normally specific to a particular job, and are only obtainable if you've got a skilled qualification, or if the employer can prove they can't get a suitable NZer to do the work.
http://www.immigration.govt.nz/migra.../requirements/ There is the Working Holiday Visa, if you're within the age limit, which is an open visa - that is, on the WHV, you can take any job that's offered to you, for a limited amount of time.
http://www.immigration.govt.nz/migra...orkingholiday/ Having a WHV can get you started in a job while you go through the process of applying for a full temporary work visa to let you stay longer, or Residence if you qualify.