Hiring a FlatBuffers developer can significantly enhance your data handling capabilities. They can create highly efficient serialized data structures that enable rapid reading and writing operations, improving application performance. Their expertise can help reduce memory allocations, minimize data copy operations, and increase speed of data transmission across networks. This can be particularly beneficial in real-time gaming, mobile development, and other performance-critical applications. Additionally, FlatBuffers developers can contribute to cross-platform compatibility, as FlatBuffers supports various programming languages and systems.