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...

Amanda Steigman

Mar 20, 2026

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...

Ella Yarmo-Gray

Mar 19, 2026

How Etsy Uses LLMs to Improve Search Relevance

Ever searched for something specific, only to be met with results that are close, but not quite? On Etsy’s Search Relevance...

Yuqing Zhang

Jan 16, 2026

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...

David Weinzimmer

Oct 29, 2025

Understanding Etsy’s Vast Inventory with LLMs

For more than 20 years, Etsy has been the destination for human creativity online. Our marketplace is home to more than 100 million...

Vipul Setty

Oct 13, 2025

Building Etsy Buyer Profiles with LLMs

Every day, shoppers from Etsy's community of nearly 90M buyers visit our marketplace to search for unique, handmade, and vintage...

Isobel Scott

Sep 3, 2025

Context engineering case studies: Etsy-specific question answering

This post investigates the benefits and limitations of prompt engineering in two instances of AI-assisted onboarding relying on...

Jerome Bellegarda

Aug 19, 2025

Adopting Jetpack Compose for Etsy’s Android App

One of our Guiding Principles at Etsy is that we “commit to our craft.” This means that we have a culture of learning, in...

John Kalmi

Jan 28, 2025

Machine Learning in Content Moderation at Etsy

At Etsy, we’re focused on elevating the best of our marketplace to help creative entrepreneurs grow their businesses. We continue...

David Azcona

Aug 6, 2024

Efficient Visual Representation Learning And Evaluation

Etsy features a diverse marketplace of unique handmade and vintage items. It’s a visually diverse marketplace as well, and computer...

Eden Dolev

Jun 7, 2024

How We Built The Deals Tab in Swift UI

Balancing Engineering Ambition with Product Realism Introduction In July of 2023, Etsy’s App Updates team, responsible for the...

Pierre Rodgers

Mar 5, 2024

Macramé: Untangling the Knot on the Etsy Android Listing Screen

Easily the most important and complex screen in the Buy on Etsy Android app is the listing screen, where all key information about...

John Kalmi

Mar 18, 2024