Hakhyun Kim is a software engineer with nine years of experience building fintech and payments systems in Seoul, having joined KakaoPay via its 2018 blind recruitment and later moved to Viva Republica (Toss) to develop offline payment services. He brings hands-on expertise in production fintech environments, shipping features that bridge digital wallets and real-world transactions. Educated in computer engineering at Hongik University, Hakhyun has progressed from core fintech product work to tackling the complexities of offline payment integration. Colleagues describe him as a pragmatic engineer who balances reliability and product needs, and his career path shows a focus on mission-critical payment flows rather than frontend polish.
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Hakhyun Kim - Software Engineer at Viva Republica (Toss)