There are many jobs available in Miitopia. Every job has different powers, abilities, and stats.
Default jobs for the first world:
Jobs unlocked after clearing Greenhorne
Jobs unlocked after clearing Neksdor
Jobs unlocked with charms
Job changesAfter every area, the Dark Lord seals away the player's powers and they have to choose a new job. But after clearing the Realm of the Fey the player's powers are still there because they were "too strong".
In Karkaton, right before the volcano, the player and their party members will become able to change into any job of their choice, so the player's Mii can choose a job that the Dark Lord sealed away previously. A Mii's old jobs' progress will be maintained even after being sealed.
CharmsTwo of the fourteen jobs are found via charms (those being the Elf and Vampire). If one fulfills certain requirements (either helping a vampire in the Travelers' Hub to get the Bat Charm and unlock the Vampire job or making your way through the Uncharted Galados in the Galados Isle to get the Elven Charm and unlock the Elf job), you can obtain charms which unlock secret jobs.