Bailey, who leads the Apple Pay team under Apple services chief Eddy Cue, will discuss how Apple is bringing customers and merchants an "easy, convenient, and secure payments experience," according to the announcement.
"I'm thrilled to talk to the payments industry at TRANSACT," said Bailey. "We have a great story to tell about how we are working to bring customers even better payment experiences in all aspects of their daily lives."
TRANSACT, hosted by the Electronic Transactions Association, runs April 30 through May 2 at the Mandalay Bay Convention Center in Las Vegas.
Apple Pay has been gradually expanding across Europe, Asia, and the Middle East. The service launched in Belgium and Kazakhstan in November, made its long-awaited debut in Germany last month, and is "coming soon" in Saudi Arabia. Reports suggest the service will also launch in the Czech Republic, Slovakia, and Slovenia soon.
Apple Pay first launched in the United States in October 2014 and has since expanded to many regions, including the United Kingdom, Canada, Australia, Belgium, China, Hong Kong, Singapore, Switzerland, France, Germany, Japan, Spain, Italy, Sweden, Finland, Denmark, Russia, New Zealand, Brazil, Poland, Ireland, and Ukraine.