About Me

Hi everyone, I’m Yu Jongmin (k0yote). I’m a blockchain engineer based in Japan with 20+ years of IT experience — including 15 years in game development and 7 years in blockchain. I work as a freelance engineer designing and building NFT infrastructure, DApps, and multi-chain systems.

Background

Coming from a long game development career, I bring a production-engineering mindset to Web3 — focusing on reliability, scalability, and good UX. I particularly enjoy bridging backend, smart contracts, and frontend within a single project.

Tech Stack

• Languages: Go, Solidity, TypeScript (currently learning Rust)

• Backend: Gin, gRPC, sqlc, PostgreSQL, Redis

• Frontend: Nuxt3, Vue.js

• Smart Contracts: Foundry, OpenZeppelin, go-ethereum

• Chains: Ethereum, Polygon, Soneium, Kaia (formerly Klaytn), LINE Blockchain

• Infra: GCP / GKE, Pub/Sub

Areas of Focus

• NFT platforms & GameFi

• MPC wallets (GG20 / tss-lib) and threshold signatures

• Stablecoin payments (JPYC, EIP-3009 gasless transfers)

• CREATE2 deterministic cross-chain deployment

• Web3 accounting & compliance (Japanese regulatory frameworks)