Pete Thompson was named chief product officer, while Mazen Rawashdeh becomes chief technology officer.
Both will be senior vice presidents reporting to eBay President and CEO Devin Wenig. They'll be based in San Jose, eBay's headquarters city.
Thompson, with two decades of experience in products and services, had been vice president of Alexa voice service at Amazon, the Seattle online retailing giant.
He also had been chief operating officer at TiVoand held executive positions at Microsoft, T-Mobile and other companies.
EBay said in a statement Monday that Thompson will focus on "simplifying an increasingly personalized and discovery-based shopping experience," while providing the site's merchants with tools and insight.
Rawashdeh for three years has been eBay's head of platform engineering. He will continue in that role while expanding his brief to include artificial intelligence, payment and risk engineering and other subjects.
Ebay shares were trading up 0.7% at $40.49.