Hiring a Full SDLC (Software Development Life Cycle) developer is beneficial as they have a comprehensive understanding of all stages in software development, from initial planning to maintenance. They can identify issues, implement solutions, and adapt to changes swiftly, ensuring the software's effectiveness and reliability. Their holistic perspective enhances communication, reduces misunderstandings, and improves efficiency, saving time and resources. They can also provide valuable insights for strategic decision-making, helping to align software development with business goals.