Tech Blog Archive

Solving technical challenges at scale to power the world’s largest Internet marketplace.

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Multi-Objective Ranking for Promoted Auction Items

Determining which promoted auction items to display in a merchandising placement is a multi-sided customer challenge that presents opportunities to both surface amazing auction inventory to buyers and help sellers boost visibility on their auction listings.

By: Ishaan Arora, Chen Xue, Jesse Lute and Dan Schonfeld
Machine Learning

Sherlock.io: An Upgraded Machine Learning Monitoring System

Billions of queries require new, smarter alerting features.

By: Huai Jiang
Microservices

eBay's Notification Streaming Platform: How eBay Handles Real-Time Push Notifications at Scale

A case study demonstrates how eBay's Notification Engineering team optimizes a streaming system in a microservice architecture to support high-throughput broadcast notifications.

By: Xiaoye Wang
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Multi-Relevance Ranking Model for Similar Item Recommendation

Buyers reveal a whole range of behaviors and interests when they browse our pages, so we decided to incorporate these additional purchase intent signals into our machine learning model to improve the relevance of our recommended items.

By: Chen Xue, Rachel Vishnepolsky and Zhen Ge
Developer Tools

OpenFeature, With Contributions From eBay, Submitted to CNCF's Sandbox Program

The new open feature flagging standard enables companies to deliver cloud-native applications more effectively.

By: Justin Abrahms, Principal Architect, Chair of eBay's Open Source Program
Competitions

eBay’s 3rd University Machine Learning Competition: Predicting Shipping Delivery Dates

For our annual ML competition, we challenged university students to predict how many days a carrier takes to deliver packages.

By: Uwe Mayer, Senior Applied Researcher
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Improving Shopping Recommendations for Customers Through eBay’s Relevance Cascade Model

Under the new machine learning model, buyers are recommended items that are more aligned to their shopping interests on eBay.

By: Chen Xue, Applied Researcher

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Deep Learning

Building a Deep Learning Based Retrieval System for Personalized Recommendations

A step-by-step guide on how to build a state-of-the-art recommender system in an industrial setting.

By: Yuri M. Brovman
Developer Tools

How eBay Developed an Automatic Testing Solution for Batch Application Upgrades

A look at how our eBay technologists created an automatic testing solution for batch applications.

By: Paul Zhang and Tao Jin