As previously mentioned, we will gradually show you some tips and tricks to predict the gender of German nouns.
The first set of tips are especially useful for job titles.
Most nouns ending in -e are feminine.
Most nouns ending in -er are masculine. The reason being, many male job titles have this ending.
Female professions end in -in.
(male) teacher ⇒ (female) teacher
(male) baker ⇒ (female) baker
Sometimes an extra "Umlaut" is needed: a → ä
(male) farmer ⇒ farmer (female)
(male) doctor ⇒ (female) doctor
This will do for now, more to follow :)