The architecture underpinning the Facebook platform relies on a diverse range of programming languages. Key among these are PHP, which forms a significant portion of the codebase, and Hack, a dialect of PHP developed by Facebook to improve performance and scalability. Additionally, languages like C++, Java, Python, and Erlang contribute to various components of the platform’s infrastructure.
The selection of these languages reflects a strategic approach to addressing different engineering challenges. PHP and Hack are well-suited for rapid development and iteration on user-facing features. C++ enables the creation of high-performance systems for handling large volumes of data and complex computations. Java plays a role in server-side applications and infrastructure services. Python is utilized for data analysis, machine learning, and automation tasks, while Erlang supports the development of robust and scalable messaging systems.