LinkedIn's Activity Feed Architecture
How LinkedIn assembles the professional feed for 900M+ members. Shows content ingestion through Kafka, Feed Mixer combining posts from connections, ML Ranking Service for relevance scoring, Social Graph on Espresso, Profile Cache on Couchbase, followed feed index, notification service, and A/B testi…
general · architecture diagram.
How LinkedIn assembles the professional feed for 900M+ members. Shows content ingestion through Kafka, Feed Mixer combining posts from connections, ML Ranking Service for relevance scoring, Social Graph on Espresso, Profile Cache on Couchbase, followed feed index, notification service, and A/B testing.
Created by
February 9, 2026
Updated
February 13, 2026 at 5:47 PM
Type
architecture
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