JUN 2, 2026

Reducing experiment duration with predicted control variates

In 2021, we published a blog post titled “Increasing experimentation accuracy and speed by using control variates,” describing how we reduce the variance of...

Performance CUPED Experimentation Control Variates Experimental Design

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Shaping Product Understanding with Contrastive Reinforcement Learning

Etsy’s marketplace is defined by the creativity and craftsmanship of our sellers and the hundreds of millions of highly diverse products they offer. You can...

PlatformFrontend

10 min

EtsyMar 20, 2026

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...

PlatformFrontend

13 min

Weekly Brief

Top 10 engineering articles delivered every Monday.

EtsyMar 20, 2026

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...

PlatformFrontend

13 min