noun
job-hopper
A person who frequently changes jobs, often used in business or HR contexts. Carries a slightly negative nuance in Japanese, implying lack of commitment or stability.
彼はジョブホッパーで、一年ごとに会社を変えている。
He is a job-hopper, changing companies every year.
ジョブホッパーと見られないように、最低でも三年は同じ会社にいたほうがいい。
To avoid being seen as a job-hopper, it's better to stay at the same company for at least three years.