John is the founder of $7 Billion software company Five9 (NASDAQ: FIVN) and the digital health company DoctorBase (sold to Kareo in all-cash deal). He's also an angel investor in multiple Y-Combinator startups including Rappi (raised $1 Billion from SoftBank) and Lvl5 (acquired by DoorDash).
John occasionally writes for TechCrunch, Forbes and at https://johnsungkim.com, while coaching software developers how to maximize their careers at JetBridge.com.
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