There are many advantages to hiring a Mono developer. Mono is an open source project, which means that developers can contribute to the project without having to pay any fees. This makes it very attractive to companies who want to use the latest technology but don't want to spend a lot of money on licensing fees. Mono is also cross-platform, meaning that applications written in Mono will run on any operating system that supports the .NET Framework. This makes it ideal for companies who want their applications to be available on multiple platforms. Finally, Mono developers are usually very experienced and knowledgeable about the platform, meaning that they can provide high quality applications and services.