Work and job are easily confused, so here are some examples to show when each one is used:
Work = mental or physical activity (usually as a means to earn money)
Work is a verb:
I work from 9 am to 5 pm
She works for a multinational company.
And a noun (uncountable):
In the accounts department they always have a lot of work at end of the month.
As it is uncountable, it has no plural form. So:
“Esta semana tenemos que terminar dos trabajos” could translate as:
This week we have to finish two projects / assignments.
Work also refers to the place where a person is employed:
At the moment, she spends more time at work than at home.
Job (countable noun) = a paid position of employment = profession
The company is going to offer over 500 jobs.
What is your job? I am a doctor.
A job might be full-time (tiempo completo) or part-time (tiempo parcial)
Verbs that we use with job:
To look for a job – buscar trabajo
To apply for a job – solicitar un empleo
To get a job – conseguir un trabajo/empleo