For those of you who haven't put this together yet, this guy is Bob Lee.
Bob Lee, former CTO of Square (now Block), has joined MobileCoin as Chief Product Officer. As an early investor in and advisor to the cryptocurrency and digital payments startup, Bob helped shape product and technology strategy. He now oversees the development of MobileCoin’s product portfolio.
Bob has diverse experience building both digital and physical products for a mobile-first world. He is most prominently known as the first CTO of Square, and the creator of Cash App (formerly Square Cash). Prior to Square, Bob was at Google leading Android’s core library team and launching the world’s most used operating system.
Recently, Bob has been exploring a range of technologies and services. He founded the social network Present, which leverages sophisticated location-based technology. He invested in and advised groundbreaking companies like Figma, Clubhouse, Beeper, and Faire.
Bob also applied his expertise to the COVID-19 pandemic, from assisting the WHO with their mobile app to leading development for an at-home testing company.
https://mobilecoin.com/blog/former-square-cto-bob-lee-joins-as-mobilecoins-chief-product-officer
I cannot find any information on the specific app, or other tech he was involved in with the WHO, nor can I find the conference where he was scheduled to speak.
He has an impressive CV: Startup advisor and angel investor. Former CTO of Square. Created Cash App. Created Guice. Added several features to the Java programming language and platform (like lambdas). Led the core library development for the first few years of Android. Investor in SpaceX, Clubhouse, Tile, Figma, Faire, Orchid, Addressable, Nana, Ticket Fairy, Gowalla, Asha, SiPhox, Netswitch, Found, et al.
However his linked in doesn't mention the WHO either.
https://www.linkedin.com/in/crazybob