Greg Sun is a Staff Engineer at Genspark, based in Singapore, where he builds Call For Me — Genspark's real-time AI phone-calling agent — and Genspark's voice assistant. On top of Twilio's voice infrastructure, he builds agents that hold natural, real-time phone conversations and get real-world tasks done on the user's behalf for a global user base. His broader focus is voice as the operating system for AI: a hands-free, full-duplex entry point where a spoken request is understood, intelligently dispatched, and executed by AI agents in the background — making powerful AI feel effortless. Before Genspark, he spent six years building Xiaodu, Baidu's voice assistant, and earlier worked on knowledge graph at Google and web search at Baidu. He holds a master's degree in software engineering from Tsinghua University.