There are many reasons to hire a NHibernate developer. First, NHibernate is a very popular object-relational mapping (ORM) tool for .NET development. It is used by many large companies, including Microsoft, Amazon, and Google. Second, NHibernate makes it easy to map objects to database tables and vice versa. This allows developers to work with data in an object-oriented way instead of having to write SQL queries. Third, NHibernate can improve the performance of applications by caching frequently accessed data in memory. Finally, NHibernate developers are typically very experienced in working with databases and ORM tools, which can save you time and money in the long run.