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. Joined after a month of remote handover, now the sole frontend engineer.

• Distributed the TGE token airdrop claim page's requests across 10 public JSON-RPC nodes, running with zero dev-side CS issues. Listed on Binance Alpha, Coinone, Bitget.
• Built a reward app (React Native + Expo, Admob) and a matching PWA in parallel. Also designed a casual-clicker-plus-betting blockchain game, an NFT staking site, and an outsourced mini-game, solo.

A monthly-refreshed blockchain game mission platform, a GXC spin-off built by a two-person team.

• Joined at the team-building stage; owned the website, NFT smart contracts, and purchase/burn verification logic. Built the social-verification mission platform that earned 10K+ USDT.
• Two-person team, paired with one backend/infra engineer. Turborepo monorepo, Thirdweb whitelisting, OAuth for Twitter, Epic Games, and Discord.

Linea's largest GameFi platform, helping Web2 games move to Web3. Technical collaboration with wallet teams including Consensys (MetaMask).

• User count up 20,000%+ after the rebrand, with 1.38M+ monthly transactions and $152.73K+ monthly volume. Ranked #26 overall on DappRadar's gaming sector and #1 on Linea (April 2024).
• Sold out an 8,888-piece NFT collection in a week, grossing 300M+ KRW. Collaborated in written English with MetaMask (Consensys), Unisat, and Facewallet on bug and improvement reports.
• Split the design system into an npm library (catze-ui) and migrated styled-components to Tailwind. Cut the operational kill switch time by 10+ minutes via the back office.

In-house investment management tool for an accelerator. Six months as an intern, then two months on contract.

FOUND, a GPS-based lost-and-found reward app. 5k Play Store downloads, ran until Feb 2020.