There are many reasons to hire a Spark developer. Some of the most popular reasons include: - Speed and Efficiency Spark is known for its speed and efficiency. This can help you save time and money on your project. - Scalability Spark is very scalable, meaning it can handle large data sets with ease. This is important if you have a lot of data that needs to be processed quickly. - Machine Learning capabilities Spark has powerful machine learning capabilities that can be used to improve your business processes or create new ones entirely.