Swift developers can help speed up the development process by leveraging their expertise in the language and its frameworks. They can quickly build prototypes, develop features, and troubleshoot issues, leading to faster time-to-market and a more efficient development process.

Swift programmers are skilled in designing and developing user interfaces, integrating with device hardware and sensors, implementing algorithms and data structures, testing, debugging, and optimizing performance.  

Swift developers are skilled in writing performant code, utilizing Swift's features to ensure that their code runs efficiently and without errors. This can result in applications that are faster and more responsive, leading to better user experiences.

Swift developers are often at the forefront of innovation in the Apple ecosystem, exploring new features and frameworks as they are released and incorporating them into their development process. This can help ensure that your team stays up-to-date with the latest tools and technologies, and can provide a competitive advantage in the marketplace.

In as much as it may be obvious, but still, it has to be said that developers who specialize in Swift naturally have extensive knowledge and experience in working with the programming language, including its syntax, data types, and control flow. They are familiar with Swift's features and frameworks, and can utilize them more effectively to build efficient and high-quality applications for Apple's ecosystem.