Alyssa will head up engineering operations for Square's infrastructure and payments platform, which processes tens of billions of dollars in payments annually. Most recently the Vice President of Amazon Web Services (AWS) Storage Services, Alyssa led services including Amazon S3 and Amazon EBS through hypergrowth, and scaled the teams, software, and businesses.

"Making technology simple is a fun challenge because it requires tackling massive complexity," Alyssa said. "I've spent the last 7 years building simple, reliable, and cost-effective services that help entrepreneurs scale their business. I'm super excited to join the team at Square because local sellers deserve access to the same tools and opportunities to grow."

Prior to AWS, Alyssa was Amazon's director of software development for ordering, with responsibility for Amazon's ordering workflow software and databases. Before Amazon, Alyssa spent 12 years at Microsoft working on databases, data access technologies, and internal customer relationship management software in a variety of engineering, program management, and product unit management roles. Alyssa started her career as a developer in the financial services industry.

In addition to Alyssa, Square's leadership team includes recent hires Françoise Brougher as Business Lead (from Google) and Product Lead Gokul Rajaram (Facebook), as well as Chief Financial Officer Sarah Friar (Salesforce), Hardware Lead Jesse Dorogusker (Apple), Brand Lead Ricardo Reyes (Tesla), and General Counsel Dana Wagner (Google).