Hiring a Memory Management Developer offers several advantages. Firstly, they can significantly improve the efficiency of software applications. Their expertise in allocating, organizing, and managing computer memory ensures optimal performance, minimizes latency, and reduces the risk of memory leaks or errors, thereby enhancing user experience.

Secondly, they can help in creating scalable applications. As the demand for an application grows, it needs to handle more data, connections, and processes. A developer with memory management skills can design systems that can scale smoothly without crashing or slowing down.

Thirdly, they can contribute to cost efficiency. Efficient memory management can reduce the need for additional hardware resources, leading to significant cost savings.

Fourthly, they can improve system security. They understand the complexities of memory management, including buffer overflow and other vulnerabilities that hackers might exploit. They can build applications less prone to such security risks.

Finally, their skills can be critical for applications where real-time performance is crucial, such as gaming, high-frequency trading, or scientific simulations. In such scenarios, even a minor improvement in memory management can lead to a substantial competitive advantage.

In conclusion, hiring a Memory Management Developer can greatly enhance application performance, scalability, cost-efficiency, and security, particularly in high-demand, real-time scenarios.