Hiring a Formal Verification developer is crucial for ensuring the correctness and reliability of software systems. They utilize mathematical methods to prove the accuracy of software, providing an additional layer of security and assurance beyond traditional testing. This becomes paramount in high-stakes industries like aviation, healthcare, or finance where software errors can lead to significant consequences. Their expertise reduces the risk of system failure, enhances software reliability, and can save on long-term costs associated with debugging and fixing software issues.