Hiring a Hacklang developer brings in expertise in a statically typed language designed for HHVM, offering early error detection, fast execution, and enhanced security. They can efficiently handle large codebases, enhancing productivity. Their skills in type safety ensure fewer runtime errors and crashes. Moreover, their understanding of async programming promotes non-blocking code for faster applications. They can also seamlessly integrate with existing PHP codebase, providing flexibility. Their knowledge of Hacklang can lead to cleaner, safer, and more reliable code, improving overall software quality.