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Hyojun Kim (jun.kim) is a South Korean software engineer and serial builder based in San Francisco who began coding at age nine and founded a developer community of 200K members at fourteen. He joined Airbridge as employee #1 and helped scale the B2B mobile attribution SaaS to $30M ARR and a pre-IPO stage before departing. He later served as a founding engineer on Cosmo, the fan-engagement platform tied to the K-pop group tripleS, and is now co-founder and CEO of his Y Combinator F25 company.

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