JONG HYUN LEE
Full Stack Developer
Contact Info
rivolt2022@gmail.com
01066001566
I'm a developer who finds pure joy in crafting solutions, driven by the desire to create products that genuinely benefit people. With each line of code, I aim to build something meaningful and impactful, something that resonates with users and brings real value to their lives. I'm always open to exciting side projects and startup collaborations - let's build amazing things together! Whether you have a groundbreaking idea or are looking for a technical co-founder, I'd love to hear from you.
Education
Bachelor of Science in Computer Engineering
2006-2012
Master's program at the Graduate School of Artificial Intelligence, Yonsei University
2025-
Experience
Web Game Platform
Began my career as a web game platform developer, building and managing core infrastructure for high-traffic online gaming services. In this role:
- Developed scalable solutions to handle large user bases and peak traffic demands.
- Focused on delivering a stable and responsive user experience for dynamic, fast-paced gaming environments.
Settlement Platform
Developed an advanced settlement platform focused on reconciling and calculating settlements for products and coupons. Built with Spring and Java, this platform:
- Addressed complex financial workflows, optimizing accuracy and efficiency in the settlement process.
- Enhanced system stability and scalability, supporting high-volume transaction processing
Education Platform
Contributed to several backend projects using SAP and the Spring Framework. These projects included:
- SAP-based Finance, Budget, and Procurement Systems: Developed robust financial and procurement modules that seamlessly integrated with institutional workflows.
- Backend Development for an Education Platform: Utilized the Spring Framework to build scalable backend solutions for various service applications, improving both accessibility and efficiency.
Key Strengths
Technical Expertise Across Stacks
Highly proficient in TypeScript, Ruby, Python, Java, PHP, with frameworks including React, Next.js, Rails, Node.js, Spring, and Nest.js. Full-stack capabilities including mobile development.
Autonomous Problem Solver
Capable of managing projects from concept to deployment, with independent problem-solving skills ensuring timely delivery.
AI and Innovation Enthusiast
Actively integrate cutting-edge AI technologies, leveraging tools like LangChain, OpenAI API, and embedding techniques.
Commitment to Code Quality
Focus on building robust, scalable systems optimized for performance and user experience.
Technical Stack
languages
TypeScript, Ruby, PHP, Java, JavaScript, Python, Kotlin, ABAP, Scala
frontend
React, Next.js, Tailwind/Bootstrap, Zustand, MST, MobX
mobile
React Native, Flutter
backend
Ruby on Rails, Node.js, Spring, Nest.js, FastAPI, Spring boot, JPA, Mybatis, QueryDSL, MSA, sqlalchemy, alembic
databases
MySQL, PostgreSQL, Oracle, NoSQL, Redis, Dynamo DB, Tibero, Turso, SQLite, Supabase, Firebase, RDS
devOps
AWS, Naver Cloud, GCP, Docker, Kubernetes, Vercel, Circle CI, GitHub Actions, Terraform, ElasticSearch, Flyio
AI
LangChain, Cursor, RAG, Pinecone, NLP tools
ide
IntelliJ, RubyMine, Pycharm, Webstorm, Vim, VSCode, Eclipse
collaboration
Notion, Slack, Discord, Redmine, Jira
Notable Projects
Web Game for DoubleU Games
Developed and localized a web game for the Taiwan market
- • Complete backend and frontend development for high-traffic gaming
- • Built using Ruby on Rails and React with cultural localization
- • Enhanced user engagement and satisfaction
- • Successfully deployed and operated in Taiwan market
Chatki
Chatbot service for automating Q&A interactions
- • Led development team of experienced engineers as Tech Lead
- • Scalable infrastructure using Nest.js and AWS
- • Slack integration for automated responses
- • ElasticSearch for optimized data retrieval
- • Successfully managed cross-functional team collaboration
Prompt Genie
ChatGPT Korean translation Chrome extension
- • Complete self-development in 2 days
- • 3x faster response times
- • Keyboard-only mode
- • 300,000+ downloads
Travel Writer
AI-powered travel planning extension
- • Complete self-development from scratch
- • Primer Hackathon Finalist
- • Custom itinerary generation
- • LangChain and YouTube API integration
- • RAG implementation
Korean Stock Auto-Trading Site
Automated trading platform for Korean stock market
- • Custom trading algorithms
- • Real-time data processing
- • Financial data integration using DART API
Donghwa Book
Mobile eBook application
- • Complete self-development
- • State management with MST
SlowSide
Meditation app with VR features
- • Complete self-development from scratch
- • iOS/Android support with Rails backend
- • AWS media converter integration
- • VR elements implementation
Snap2HTML
AI-powered code generation from images
- • Automatic HTML/React markup generation
- • Chrome extension (2025 release)
- • AI-powered visual element processing
Yonsei Legacy Donation Project
Yonsei University's legacy donation platform
- • Complete self-development from scratch
- • Developed donation management system for Yonsei University
- • Integrated donor benefits and tax deduction features
- • Built memorial service management system
KnowShopping
No-show shopping aggregator
- • Independently developed most of the core features including payment, authentication, and product management at wecommit.ai(https://wecommit.ai/)
- • Created three separate projects: ns_mobile (React Native), ns_web (Next.js), and ns_ai (FastAPI)
- • No-show shopping aggregation
Bridge-Book
Book-based Social Dating Service
- • Founder and Lead Developer
- • Creating a unique dating platform that connects people through their reading preferences
- • Implementing AI-powered book recommendation and matching system
- • Launching in first half of 2025
I strive not to remain rooted in the present but to push forward, working toward a better, more inspired future. My aim is to continuously make meaningful contributions that extend beyond the present moment and create lasting positive change.