Jake Kim 김성주

A multi-exchange terminal built toward an institutional trading desk. $10B notional processed and $1M revenue during pilot and private beta.

• Designed the order-execution flow that bundles options and futures orders across venues and accounts into one order form, unifying each exchange's symbol format and account structure on the frontend.
• Cut steady-state browser memory from 3.8GB to about 1GB. Replaced react-grid-layout's CPU-bound layout math with a translate-based grid so chart-heavy dashboards drag without stutter.
• Established a context injection + Claude–Codex planner / reviewer workflow. Edge cases that a single model or agent would have left to resurface days or weeks later get caught at review, saving one to three-plus working days per feature. Built a Figma MCP + i18n agent pipeline for localization.

A roguelike minesweeper on the Abstract chain. Partnered with YGG Play and Raito. The service has ended; the link is a build on the original frontend core.

• The payment contract I designed processed 19,939 purchases with zero failures, about $1.5M in total (72,500 USDC, 25,000 USDT, 104.65 ETH, 50,616,446 YGG). Hover an amount for the live conversion.
• Upgradeable proxies let token-economy changes for repurchase and retention ship weekly without redeploying. Externally audited, ran on mainnet.
• Built and ran the client and in-game logic solo using context injection. Session keys record in-game actions on-chain without a signature each time.

Web3 arm of game studio 111percent. Reward app, NFT community, $GM token claim site.

• Designed the token-claim dApp to keep wallet connection and transactions stable through a TGE with 10k+ daily spikes. Listed on Binance Alpha, Coinone, Bitget.
• Native app (React Native, Expo) and PWA for the ad-reward product, NFT verification and staking community site, upgradeable contracts for a betting game.

A platform where players test a new blockchain game every month and compete for rewards.

• Built the social-verification mission platform that earned 10K+ USDT. Wrote and updated NFT contracts, worked in a client + back-office monorepo.

Blockchain gaming platform helping Web2 games move to Web3. Backed by Consensys.

• Onboarded 900k+ gamers unfamiliar with Web3 onto the chain. NFT purchase and verification UX that contributed to up to $150k monthly revenue.
• Eight NFT mint pages grossing 300M+ KRW, transaction-receipt verification logic, back-office tooling, and a shared UI component library on npm.

In-house investment management tool for an accelerator. Automated a three-day contract-prep process.

FOUND, a GPS-based lost-and-found reward app. 5k Play Store downloads.