As a part-time programmer, your job is to help develop and code websites or software applications for your employer. In this role, you may determine the best programming languages to meet their needs, collaborate with other programmers to create the software, and test existing code to make sure it is as error-free as possible. Part-time programmers usually work on projects that are not as time-sensitive as those that full-time programmers work on, though your hours may vary if employers want to speed up the development process. Many part-time programmers work on a contract basis and take multiple assignments at once from different clients.