Erlang
ELI5 — The Vibe Check
Erlang was built by a telecom company in the 80s to handle phone calls that must never drop. It's the cockroach of programming languages — incredibly hard to kill, handles millions of concurrent processes, and has been quietly running the internet's infrastructure for decades.
Real Talk
A functional programming language designed by Ericsson for building massively concurrent, distributed, and fault-tolerant systems. Erlang runs on the BEAM virtual machine, uses lightweight processes with message passing, and features hot code swapping for zero-downtime updates.
When You'll Hear This
"WhatsApp handled 2 billion users with only 50 engineers thanks to Erlang." / "Erlang's 'let it crash' philosophy sounds scary but it's actually genius for resilient systems."
Related Terms
Concurrency
Concurrency is juggling multiple tasks at once — not necessarily at the exact same instant, but switching between them fast enough that they all seem to be...
Elixir
Elixir is like Ruby's syntax mated with Erlang's superpower: millions of tiny processes running independently, each with their own memory.