A "how not to build software" developer is essentially one who practices poor development habits. They might ignore planning and documentation, leading to disorganized and confusing code. They may avoid testing, allowing bugs and errors to persist. They might be resistant to collaboration, limiting the potential for innovation and improvement. They may also be stubborn about learning new technologies or methods, stifling their professional growth. They may also disregard user feedback, resulting in a product that does not meet the needs of its intended audience. Such practices can lead to inefficient, ineffective, and low-quality software.