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Erlang is a functional programming language designed for building massive, real-time systems with 99.9999999% availability.

Engineered by Ericsson in 1986 to power telecommunications infrastructure, Erlang excels at managing millions of concurrent processes without breaking a sweat. It uses a lightweight actor model and the BEAM virtual machine to ensure that if one process fails, the rest of the system stays upright (a philosophy known as let it crash). Today, it is the backbone for high-stakes platforms like WhatsApp, which handles billions of messages daily, and Goldman Sachs’ high-frequency trading systems. If your project demands hot-swappable code and zero downtime, Erlang is the industry standard for reliability.

https://www.erlang.org