Hiring a Flowtype developer ensures robust, error-free code as Flowtype is a static typing tool that helps catch errors during development. They can provide better code structure and maintainability, enhancing productivity. Their expertise enables efficient refactoring and improves code readability. They can help manage complex codebases by providing precise documentation through code, thus improving team collaboration. Their skills can be crucial in reducing runtime errors, ensuring application stability, and improving user experience. The developer's proficiency in Flowtype can lead to a more reliable, efficient, and high-performing application.