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Re:WhatsApp Cofounder on How It Reached 1.3B Users Without L... by maqbool on Sunday September 03, 2017 @09:30AM (#15161320)
tech stack : Erlang
Re:WhatsApp Cofounder on How It Reached 1.3B Users Without L... by rdtsc on Sunday September 03, 2017 @11:00AM (#15161747)
Here is the description of their stack and how Erlang helped them by Rick Reed at Erlang Factory:

https://www.youtube.com/watch?v=c12cYAUTXXs

Here is Jamshid Mahdavi talking about their stack as well but focusing on development, testing and shipping code. Some of the stuff they do will surprise you if you've been at a shop with a large QA team and deployment pipelines with many stages.

https://www.youtube.com/watch?v=tW49z8HqsNw

Re:WhatsApp Cofounder on How It Reached 1.3B Users Without L... by zerr on Sunday September 03, 2017 @02:01PM (#15162827)
Modified Erlang, as described in one of their talks.