Etsy Engineering13 min readOct 29, 2025

Improving performance by prefetching product pages from Etsy Search

Rarely are there opportunities for big, bold, game-changing improvements in web performance. The Speculation Rules API (SRA) is a recent browser development that offers just such an opportunity. This

Performance Backend

Etsy SearchSpeculation Rules API (SRA)Web PerformanceOptimization

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Making Ads Count: Using MMoE and Auxiliary Tasks to Better Connect Buyers & Sellers

When buyers search on Etsy, they need to quickly and easily find the perfect item. At the same time, sellers need to be confident their unique products are...

Etsy Engineering11 min18d ago

Migrating Etsy’s database sharding to Vitess

Etsy has maintained a sharded MySQL architecture since around 2010. This database cluster contains most of Etsy’s online data and is made up of ~1,000 tables...

Distributed SystemsDatabases

MySQLVitessKubernetesDatabase ShardingLarge Scale SystemMicroservicesDatabase Architecture

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Improving performance by prefetching product pages from Etsy Search

Making Ads Count: Using MMoE and Auxiliary Tasks to Better Connect Buyers & Sellers

Migrating Etsy’s database sharding to Vitess

How Etsy Uses LLMs to Improve Search Relevance