Blockchain Systems Engineer
I build secure smart contract protocols, validator infrastructure, and production backends — focused on security, correctness, and performance (gas optimization).
Professional Summary
Blockchain systems engineer with 5+ years of experience building smart contract protocols, validator infrastructure, and production backends.
Strong focus on security, correctness, and performance (gas optimization), with experience leading engineering teams and shipping revenue-impacting products. Interests include blockchain security, consensus reliability, and formal methods for decentralized systems.
Education
University of Maryland, College Park
B.S. Computer Science • Minor in General Business
Expected May 2026
GPA: 3.66 / 4.00
Algorithms Data Structures Programming Languages Computer Systems Computer Architecture Formal Languages Computer Vision
Work Experience
May 2021 - Jul 2023
Chief Technology Officer
B&G Systems Co., Ltd. • Blockchain Department • Seoul, South Korea
- Led a 6-member blockchain engineering team and launched products that increased company revenue by 15%.
- Designed smart contract and backend architectures emphasizing security, gas efficiency, and maintainability.
- Instituted disciplined design reviews and correctness-driven engineering practices to proactively reduce engineering risk.
CTO Team Leadership Architecture
Jan 2020 - Present (Part-time)
Freelance Blockchain Developer
Kmong Platform • Prime Member
- Achieved Prime status (top 2%) on Kmong based on client evaluations and platform metrics.
- Developed and deployed 10+ Ethereum and Solana smart contracts and token systems using Solidity and Rust.
- Delivered secure, scalable on-chain architectures and API integrations for non-technical clients.
Solidity Rust Freelance
Technical Projects
CoinHelio
Co-founder
Nov 2025 - Present
Lead crypto data analysis and research to identify market inefficiencies and arbitrage opportunities. Develop real-time data pipelines to aggregate cross-exchange signals and backtest trading algorithms.
Data Pipelines Research Backtesting
Alcohol Prevention Research Chatbot
Backend Developer
Jan 2025 - Present
Built and reviewed the backend for an NLP-based research chatbot (supervised by Grace Jeonghyun Kim, Ph.D.), ensuring reliable data collection and integrity on GCP.
Python Flask PostgreSQL Docker GCP
Blockchain Validator Node Operator
Story Protocol (Node JPN)
Mar 2025 - Apr 2025
Deployed validator nodes on AWS/Docker, monitoring uptime and performance for reliable network participation. Applied best practices in key management, access control, and observability.
AWS Docker Validator Ops
The-Adena (Blockchain Online Game)
CTO & Co-founder
Mar 2022 - Dec 2023
Led a 2-developer team to build and operate a blockchain game with 3,000+ users and USD 170K in revenue. Implemented and audited core smart contracts and token logic; verified deployments on BscScan.
GameFi Smart Contracts
Gomz Club (NFT Donation Project)
Project Lead
Apr 2022 - Jul 2023
Designed and launched a high-profile NFT campaign featuring a public figure, donating 1.25 ETH (~$2,650) to the animal welfare organization Daon Rescue, with national media coverage in major Korean outlets.
NFT Charity
Leadership & Activities
University Church
Developer
Mar 2025 - Present
Develop and maintain the full-stack website and server infrastructure (Flask, PostgreSQL) to support community outreach.
Flask PostgreSQL
Blockchain at Maryland
Blockchain Research Leader
Feb 2025 - Present
Lead student research in Web3, including on-chain data analysis and protocol case studies, and organize technical workshops.
Web3 Research
Publications
Introduction to Smart Contracts with Solidity
[Solidity로 시작하는 스마트 컨트랙트 입문]
Sole author of a comprehensive 260-page technical manuscript on smart contract security and optimization. Full draft is open-sourced on GitHub; submission to a Korean technical publisher is planned for Mar 2026.
Awards & Honors
OMSE Academic Excellence Society (OAES)
Member • University of Maryland
Recognized for academic excellence and leadership.
Smart Contract Excellence Award
B&G Systems Co., Ltd.
Won the internal smart contract competition with a Solidity contract that reduced gas costs by 13%.
Technical Skills
Back-End / Database
Solidity
Rust
Python
Node.js
Java
PostgreSQL
Front-End
React
TypeScript
JavaScript
Web3.js
Infrastructure / DevOps
AWS
GCP
Docker
Git
Blockchain Node & Validator Ops
Get In Touch
I’m always open to discussing smart contract security, blockchain infrastructure, or full-stack engineering work.