Python am I missing Design Pattern

I am working on python application, this project started for internal need the the soft is spreading to our departments. So I have time for writing again a lot of parts of my application. I want it becomes really scalabe, for the example:

First level: I have Job classes, these classes contain only variable. The number of class can increase.

Second level: I have "Worker", this class contains the common logic, whatever your job you will earn money at the end of the month. I will probably have only one type.

Third level: I have gender class, these classes contain specific logic. The number of class can increase.

You will find below a demo I did:

import abc

class Worker:
    __metaclass__ = abc.ABCMeta
    def __init__(self, job):
        self.job = job

    def get_job(self):
        print "My job is : %s" % (self.job.name)


class Scientist:
    name = 'scientist'

class Salesman:
    name = 'salesman'

class Woman(Worker):
    def gender(self):
        print "I'm a woman %s\n" %(self.job.name)

class Man(Worker):
    def gender(self):
        print "I'm a man"

if __name__ == "__main__":
    man = Man(Salesman())
    woman = Woman(Scientist())

    man.gender()
    man.get_job()

    woman.gender()
    woman.get_job()

So this model seems to be scalable, It's very easy to add a new collection of variables and can add a new class if I want a new behavior for gender (like i'm a baby)

But am I doing right? Am I missing Design Patterns? There is a way to be more scalable?