There are many reasons to hire a Twilio developer. Some of the most common reasons include: - The ability to add two-way communication features to your app quickly and easily - The ability to reach a wider audience with your app by adding SMS and voice capabilities - The ability to scale your app quickly and easily by adding more users or increasing usage without having to worry about capacity issues - The ability to save money on communications costs by using Twilio's pay-as-you-go pricing model