Now you see me, now you don’t: Story of the green online indicator on LinkedIn


Ever wondered how those green online indicators that are so pervasive in every instant messaging application and social network actually work? How do you display them in real-time for the 500 million members on the LinkedIn network? In this talk, I’ll do a technical walk-through of how we used the Play Framework and the Akka Actor Model to build this massive infrastructure that keeps track of the online status of millions of members at any given moment. I’ll describe how it distributes changes in the online status of these members to millions of other connected members in real-time.

Language: English

Level: Advanced

Akhilesh Gupta

Staff Software Engineer - LinkedIn

Akhilesh is the technical lead for the LinkedIn mobile messaging products. For the past year, he has been working on the revamp of LinkedIn’s messaging offerings to instant, realtime messaging on its mobile apps. Before this, he was the head of engineering for the Ride Experience program at Uber Technologies in San Francisco where he led a large team of backend, web, iOS and Android engineers to build delightful mobile products and infrastructure for the core Uber rider application. He holds a Masters degree in CS from Stanford University.

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