What are some large websites built with functional programming languages?

Portions of LinkedIn's backend are built in Scala: parts of communication system, distributed search, some services in the data/analytics platform, distributed social graph (non-distributed social graph is in C++), several "on the side" apps e.g., twitter integration. The list is expanding.

One component, Norbert, a cluster management system used for search and distributed social graph is open source:
http://ift.tt/2hSzFF6

Here is a talk by LinkedIn's Chris Conrad from Scala Days 2010 discussing Norbert: http://ift.tt/2hSDF8z...

There is at least one more open source Scala project on the way from the searc

MochiMedia (an ad network for casual gaming, afaik) is built largely in Erlang. Some parts of their stack are open source e.g., MochiWeb. Facebook's chat is also powered by Erlang. Indirectly, any sites using CouchDB, Riak or RabbitMQ are also powered (in part) by Erlang.

Read other related questions on Quora:

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• What is the best language to learn functional programming?

Read more answers on Quora.

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