Skills and Knowledge:

Collaboration skills: Developers must be able to work in teams of two or more to accomplish a common goal/task.
Customer-service skills: Developers must be patient and empathetic. Their customers will often experience unwanted behavior or request features. The developer must work with the customer throughout the entire design process.

Listening skills: Developers must be able to understand the problems that their customers are describing land use that information to implement a solution.

Problem-solving skills: Developers must be able to test, troubleshoot, and debug syntax and semantic errors in software.
Speaking skills: Developers must describe their solutions to their customers in a way that a nontechnical person can understand.

Writing skills: Strong writing skills are useful to developers while preparing instructions, generating design documentation and end-user documentation, and emailing responses to colleagues and customers.

Creativity: Computing is a creative activity, thus developers should be creative. Creativity and computing are prominent forces in innovation; the innovations enabled by computing have had and will continue to have far-reaching impact.