The job of a freelance electrical design engineer is to help bring a project plan from concept to manufacturing, typically on a contract basis. Someone in this role may help determine the equipment and materials needed to produce the product, design its power supply and any energy storage, and help prototype the product to verify that it works. Electrical engineering can take a wide variety of forms, such as designing an electronic toy or creating a power layout plan for a large building. Although similar job titles, a freelance electrical design engineer and an electrical engineer perform separate functions. A design engineer focuses on the design concept, while the duties of an engineer concentrate more on the actual manufacturing of a project.