Summary
Junsik Shim is a Senior Frontend Engineer with 11 years of experience building user-facing systems across startups and large Korean tech companies. He has led frontend teams and cells at Supertone and Kakao, and currently drives frontend development at Twelve Labs, blending product-minded engineering with hands-on delivery. His background includes founding and leading multiple startups, giving him strong product intuition and experience scaling teams and codebases from the ground up. Comfortable across modern web stacks, he pairs pragmatic engineering with a playful "have fun coding" ethos that keeps teams creative and resilient. Based in South Korea with a BS from the University of Wisconsin–Madison, he brings both international education and deep regional industry experience to distributed engineering challenges. An operator-turned-leader, he often moves between coding, architecture, and mentoring to turn fuzzy requirements into polished, production-ready interfaces.
11 years of coding experience
19 years of employment as a software developer
BS Computer Science, BS Computer Science at University of Wisconsin-Madison