
John Sung Kim
Serial entrepreneur, SaaS founder, investor, and AI/ML talent leader
johnsungkim
Tampa, Florida, United States
Joined December 2025
Network
11.8K connectionsSummary
John Sung Kim is a highly experienced serial entrepreneur, having successfully founded and led multiple software companies to significant milestones, including the IPO of Five9 (a cloud contact center solution) and the acquisition of DoctorBase (a mobile health platform). His journey began as a non-technical founder who overcame early challenges to build multi-million dollar companies, demonstrating strong business acumen and resilience. johnsungkim+3
Beyond his entrepreneurial ventures, John is an active angel investor, supporting early-stage startups in various sectors. His portfolio includes notable companies like Rappi, SpaceX, Lvl5 (acquired by DoorDash), and NorthBeam, reflecting his keen eye for promising technologies and market disruptions. johnsungkim+2
As the Founder and CEO of JetBridge, John is currently focused on revolutionizing software development outsourcing by connecting talented developers from regions like LATAM, Europe, and Ukraine with global employers. He advocates for best practices in outstaffing and has shared his expertise on Forbes and his personal blog. jetbridge+2
John maintains a commitment to education and mentorship, frequently speaking at universities (like Penn State, Stanford, and Kyiv Polytechnic) and industry events. He shares his insights on startup development, fundraising, and the art of storytelling for entrepreneurs. psu+3
Work
Education
Writing
An Insider's Guide To Outsourcing And Outstaffing Software Development
January 1, 2019A Forbes article providing insights and best practices for effectively outsourcing and outstaffing software development, drawing from his experience with JetBridge.
How I Created A $350 Million Software Company Knowing Nothing About Software
December 1, 2015An article detailing his entrepreneurial journey, particularly the founding of Five9 and the challenges faced as a non-technical founder building a software company.
Hobbies
After selling DoctorBase, he spent a year off, during which he traveled to Morocco, rode camels, and purchased multiple motorcycles. johnsungkim+1
He is an avid basketball fan, having had experiences with former NBA coaches and players. johnsungkim
Notes
NWNoah Wisniasaid
JSJohn Sung Kim
is one of the sharpest advisors they've worked with when it comes to distribution in healthtech.May 12, 2026
JPJackson Palmersaid
JSJohn Sung Kim
has impressed them with how they attract and hire outstanding engineering talent in the biotech or healthtech space.Jan 7, 2026
JPJackson Palmersaid they've seen
JSJohn Sung Kim
successfully lead engineering hiring efforts in manufacturing.Jan 7, 2026
Similar profiles
AS
Adam Szeptycki
CTO at JetBridge
5.1K connections
JPJackson Palmer
Head of GTM at Zeroqode
5.9K connections
JCJake Caprini
Director of Partnerships at JetBridge AI
5.1K connections
JKJimmy Ku
37.7K connections
LYLiza Yaulash
HR Engineer at tombo.ai
3K connections
GBGeorge Burke
Co-Founder & COO at ExitValve = Tax-Free Founder & Investor Solution in CA/NYC
43.8K connections