From Porcupine wiki

Developers: Developers

This section is for those willing to develop Porcupine applications. Before getting started you should be aware of the skills required:

• Good knowledge of Python (for the server-side components)
• Good knowledge of JavaScript (for the client-side components)
• XML (configuration file editing, QuiX Markup Language)

We also recommend installing an IDE, capable of editing both Python and JavaScript files, and debugging multi-threaded Python programs. See our recommendations on HowToBuildAnEfficientPorcupineDevelopmentEnvironment?.