MJ

Product Engineer | Full Stack, AI, Blockchain

MINYOUNG JUNG

I design and build products across AI and blockchain.

Centered on frontend engineering, I shape the user experience and connect the backend systems and smart contracts each product needs.

BASED IN SEOUL
~/minyoung/profile.ts
ONLINE

const minyoung = {

role: "Product Engineer",

focus: ["Full Stack", "AI", "Blockchain"],

approach: ["Design", "Build", "Ship"],

location: "Seoul · Worldwide",

};

❯minyoung.currentStatus()

Shipping end-to-end products

FRONTEND

React / Next.js

BACKEND

Node.js / Python

SMART CONTRACTS

Solidity / Foundry

01 / ABOUT

A designer's eye.An engineer's depth.A product builder's range.

Product Engineer with 4+ years of experience building products across AI and blockchain.

Across DeFi, stablecoins, and OTC trading products, I have worked on connecting user interfaces with onchain functionality.

More recently, I have expanded into AI agents and automation tools, turning complex technology into practical product experiences.

With a background in UI/UX design, I now work across frontend, backend, smart contracts, SDKs, automation, and real-time data integration as needed.

Fluent in Korean, Japanese, English, and French, with experience collaborating across global remote teams.

E2E

IDEA → PRODUCTION

04

WORKING LANGUAGES

03

FRONTEND · BACKEND · SMART CONTRACTS

GLOBAL COMMUNICATION

Languages

04

Korean

Native

🇰🇷

Japanese

Native Level

🇯🇵

English

Fluent

🇺🇸

French

Advanced

🇫🇷

CAPABILITY MATRIX

Tech Stack

01

Frontend

  • TypeScript
  • JavaScript
  • React
  • Next.js
  • Tailwind CSS
  • TanStack Query
  • Zustand
02

Backend

  • Node.js
  • Python
  • Supabase
  • Hono
  • NestJS
  • REST API
  • GraphQL
  • PostgreSQL
  • Zod
03

Blockchain

  • Solidity
  • Foundry
  • OpenZeppelin
  • Hardhat
  • Ethers.js
  • Wagmi
  • Viem
  • LayerZero
  • ERC-4337

02 / CAREER

Experience

Counterfactual

Full Stack Developer

xDFiAppA2A GitHubKintenGiwalend
01

xDFi

Delta-Neutral DeFi Yield Platform

  • Developed frontend interfaces for a delta-neutral vault system on HyperEVM
  • Built flows for gasless transactions using ZeroDev ERC-4337 smart accounts
  • Integrated Circle CCTP V2 for cross-chain USDC bridging to HyperEVM
  • Built vault and pool comparison views for APY, volatility, and position data
  • Developed analytics dashboards for funding rates, vault performance, and rolling APY
  • Designed 3D UI elements and a visual design system for the platform
02

A2A Swap

P2P OTC Protocol, Smart Contract + SDK + CLI

  • Designed and built a CREATE2-based escrow system with deterministic addresses
  • Developed the smart contracts, relayer, SDK, and CLI
  • Implemented offchain reputation logic based on completed, timed-out, and cancelled trades
  • Developed a TypeScript SDK and CLI for offer creation, RFQ discovery, and settlement through a relayer with EIP-191 authentication and fee handling
03

Kinten

AI Agent Platform

  • Built the initial frontend architecture for an AI web development automation product, including goal intake and routing, WebContainers-powered live preview, execution progress UI, and error boundaries
  • Integrated backend orchestration events via SSE into a real-time dashboard for progress, retries, recovery, and human intervention
  • Designed and built a multilingual AI magazine end to end, covering subscription management, research across social and news sources, and a multi-agent editorial pipeline
  • Automated publishing with cron scheduling, deduplication caching, pagination, and render QA
04

Giwalend

Lending Protocol

  • Built frontend flows for supply, borrow, withdraw, and repay, including projected health factor and LTV changes using contract-provided account data
  • Integrated an external EVM indexer API and transformed paginated event data for activity and liquidation views
  • Normalized Pyth price data for consistent USD values and improved wallet polling with RPC failover and batched contract reads
  • Implemented risk and APY visualizations, pre-signing contract simulation, and targeted retries for recoverable transaction errors

0xAI (fanC)

Smart Contract & Frontend Developer

  • Joined fanC, an existing Ethereum-based reward token project connected to the CELEBe short-form platform, and explored new Web3 use cases to expand its utility
  • Built prototypes for voting, rewards, user verification, and token transaction flows
  • Built internal dashboards for user activity, system events, and token transactions
  • Evaluated technical feasibility through rapid prototyping, contract testing, and end-to-end integration

Kcle One (KRWIN)

Smart Contract Developer

Concurrent project under the same organization as fanC

GitHub
  • Designed and implemented an upgradeable KRW stablecoin using Solidity, OpenZeppelin, and the LayerZero OFT standard
  • Implemented controlled token minting, burning, and redemption logic with role-based access control
  • Built cross-chain token transfer functionality and deployment workflows across EVM networks
  • Implemented contract validation and automated tests covering minting, redemption, access control, upgrades, and cross-chain transfers
  • Completed the CertiK audit process by reviewing contract logic, strengthening validation flows, and addressing audit feedback

MilkyWay

Frontend Developer

LinkedIn
  • Built data-driven interfaces for a Cosmos ecosystem liquid staking protocol integrating Celestia, Osmosis, and real-time API data
  • Developed TIA liquid staking flows covering asset selection, wallet interactions, transactions, and confirmations
  • Integrated APIs and contract data for positions, rewards, balances, and activity
  • Optimized rendering for frequent data updates and complex dashboard states

PyratzLabs

Frontend Developer

WebsiteLinkedIn
  • Built production web apps across marketplace, finance, gaming, and digital assets
  • Implemented frontend authentication and transaction flows, plus real-time data integrations
  • Developed frontend systems connected to APIs and smart contracts across Ethereum, Tezos, and EVM-compatible networks
  • Contributed to frontend architecture and performance improvements across multiple production apps
01

Artos

Marketplace for physical art with asset discovery and transaction execution flows

02

Securd

DeFi lending platform with borrowing, collateral management, and liquidation interfaces

03

Bloometa

Gaming marketplace with trading and asset interaction systems

04

Defit

Move to earn platform with NFT minting and reward distribution mechanisms

05

Kboom

Esports fan platform with engagement systems and real-time dashboards

06

Intercellar

Wine NFT platform with fiat and crypto payment infrastructure

07

Mocaverse AnimoKart

NFT minting, reveal, and upgrade system for the Animoca ecosystem

DOGAMÍ

Frontend Developer

Contributed to DOGAMÍ as a PyratzLabs ecosystem project, then joined PyratzLabs

LinkedIn
  • Built interfaces for NFT minting, reveal, staking, marketplace, and token commerce
  • Integrated Tezos smart contracts using Taquito, including wallet connection, transaction submission, status tracking, and confirmation states
  • Improved performance, usability, and reliability of NFT marketplace features
  • Maintained and extended onchain interaction logic across the platform
  • Collaborated with product and design teams to improve Web3 UX

Rakuten

UI/UX Designer

Website
  • Led UI improvements and feature planning for web and mobile products
  • Designed campaign pages, promotional pages, email campaigns, and product-related user flows
  • Conducted A/B testing and user behavior analysis to improve usability and conversion
  • Improved cross-device user experience through responsive design and UI consistency
  • Produced UI assets, design documentation, and visual materials for product and marketing teams

03 / LAB

Projects

INDEPENDENT BUILD

Mar 2026 — Present

Personal Project

MN Quant

Automated BTC futures trading system with a real-time monitoring dashboard

Python, TypeScript, Next.js, CCXT, Supabase, Telegram Bot API, Railway

  • Built a BTC futures engine combining 20 indicators into automated conviction scores
  • Added regime detection, ATR-based exits, trailing stops, and partial profit-taking
  • Improved operational reliability with state recovery, loss limits, and order reconciliation
  • Built a live dashboard and Telegram bot for PnL monitoring, alerts, and remote controls

04 / ARCHIVE

Education

01

Jan — Jun 2025

Blockchain Engineer Bootcamp

  • Completed an intensive blockchain engineering track focused on Solidity, smart contract architecture, and smart contract security.
  • Built and tested dApps with Hardhat, Web3.js, and Ethers.js, covering gasless transactions, token approvals, and end-to-end onchain interaction flows.

Seoul, Korea

02

2021 — 2022

Ironhack Paris

  • Completed the RNCP Level 6 Web Development program, a French Bac+3/4 qualification covering frontend and backend engineering.
  • Ranked first in two of three final projects during an intensive, project-driven full stack curriculum.

Paris, France

03

2009 — 2013

Kwansei Gakuin University

  • Earned a B.A. in International Law and Legal Studies in a Japanese academic environment.
  • Awarded both JASSO and Hyogo Prefecture scholarships for three consecutive years.

Hyogo, Japan