Janitors are cleaners. Typically the people who maintain apartments are called maintenance workers, handymen, or (old fashioned) superintendent. Sometimes property manager, if they also handle renting it out.
We often just call them janitors here, I bet the vernacular changes from place to place. But cleaners are often separate, janitors do maintenance work and cleaners do cleaning work
Owning a property is not a job but maintaining one can be. If you don’t own the property then that’d just be called being a janitor.
Janitors are cleaners. Typically the people who maintain apartments are called maintenance workers, handymen, or (old fashioned) superintendent. Sometimes property manager, if they also handle renting it out.
We often just call them janitors here, I bet the vernacular changes from place to place. But cleaners are often separate, janitors do maintenance work and cleaners do cleaning work
Definition of janitor:
https://www.merriam-webster.com/dictionary/janitor
Or
https://dictionary.cambridge.org/dictionary/english/janitor