Architected and delivered a semi-decentralized USDT ↔ KRW trading platform, balancing centralized compliance controls with decentralized transparency to enable secure, real-world crypto–fiat exchange in a regulated market.

Co-designed a regulation-friendly transaction flow with product and compliance, enabling secure on-/off-ramp operations tailored to Korean financial regulations and reducing manual review overhead.

Led multilingual localization (Korean/English), expanding regional adoption and driving a 40% increase in active users within the first year of launch.

Optimized frontend performance and API design, cutting page load time by 35% and improving transaction completion rates through reduced latency and error handling.

Owned end-to-end development across React, Node.js, and MongoDB, ensuring production-grade scalability and reliability for high-volume financial transactions with sub-second response times.