A design pattern developer can streamline your software development process. They have a comprehensive understanding of software architecture and can create scalable, reusable, and efficient code. Their expertise can help to solve common design issues, making the development process faster and more efficient. Moreover, they can significantly enhance the maintainability and readability of the code, making it easier for other team members to understand and work on. Their skills can lead to improved software quality, reduced development time, and cost savings in the long run.