A part-time software engineer tests, plans, and writes code for software, applications, and computer systems. As a part-time employee, you work fewer than 35 hours per week, and your duties may vary according to the type of projects on which you work. You may specialize in working with a specific computer language or developing and testing software and development methodologies for a particular system. Your responsibilities can also include determining how to deploy and configure existing software and application tools to meet the needs of a company or organization.