Azure Resource Manager templates (or ARM templates) can be used to create your Azure resources and is the Microsoft way of building Infrastructure as Code. When writing software we want the code to have good structure, be easy to understand and not contain duplicated code, but can we apply the same principles when writing ARM templates? We will look at software tools, sources of documentation, parameters, variables, functions, unit tests and how to split an ARM template into multiple files. Both developers and IT professionals will benefit from this session where we explore the ways we can create ARM templates that not only works but are also easy to read, understand and maintain.