Why WhatsApp Only Needs 50 Engineers for Its 900M Users

By Industrial Erlang User Group | Published: September 15, 2015

WhatsApp’s instant messaging service has just reached more than 900 million users, according to Wired. In an interview with Wired, WhatsApp has discussed why they have chosen the Erlang programming language to build their services.

“Erlang is particularly well suited to juggling communications from a huge number of users, and it lets engineers deploy new code on the fly.” Jamshid Mahdavi, software engineer at WhatsApp, told Wired, “It was an eye-opener to see the minimalistic approach to solving … just the problems that needed to be solved.”

According to Wired, WhatsApp had 35 engineers and around 450 million users when the company was acquired by Facebook. Today, it employs only about 50 engineers and serves more than 900 million users. WhatsApp’s success was partly due to the use of Erlang and FreeBSD, partly because of its operational simplicity.

Read the whole article at Why WhatsApp Only Needs 50 Engineers for Its 900M Users

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