Hiring a Materialized Views developer can significantly optimize your database performance. They can design and implement materialized views to store precomputed results of queries, reducing the load on your database and speeding up data retrieval. This is especially beneficial for complex, time-consuming queries or when dealing with large volumes of data. Additionally, they can manage the refreshing of these views to ensure data consistency. Their expertise is crucial for improving the efficiency, speed, and overall performance of your data-driven applications.