Business use the title of an Engineer loosely. Engineering (as a profession) by law in some countries requires require that you be part of a body or an association, also it incurs legal liabilities on the title holder and requires certain insurance fees for legal issues that may arise. However, this is rarely the case with software.
In the computing industry the Engineer title is more related to jobs that are not of pure business development nature, such as compiler design, device driver programming, embedded deceives programming, simulation programming, etc.
In short, you may be called an Software Engineer, even though your job does not satisfy the above mentioned aspects. You can verify this by visiting recruitment web sites and observing the job titles and their requirements.