Whatnot is the largest live shopping platform in the U.S. and Europe, a marketplace where buyers and sellers connect through real-time, community-driven commerce. The company surpassed $3 billion in live sales last year alone, with users spending on average 80 minutes a day browsing and buying from live shows.
The Data & AI team began rebuilding the recommendation system to support real-time online inference. They needed infrastructure that could serve tens of thousands of features per request at low latency, across deeply nested graphs and high-throughput workloads. They chose Chalk to power all core recommendation systems, from feed ranking to show discovery.
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