About
Core Competencies
SPOT Exchange Migration
Migrated 7-year legacy (qooxdoo) project to React + TypeScript + Tanstack Query
- MAU 180K → 200K (10% increase)
- Monthly events 3.6M → 4M (10% increase)
P2P Trading Service Design
Built real-time trading system based on Next.js
- Designed multi-communication (WebSocket, SSE, Axios)
- Developed entire frontend for ads, trading, 2FA systems
Web Performance & SEO Optimization
Data-driven optimization experience
- SEO: Search index 8K → 38K pages (475% increase)
- Achieved FCP under 1 second (Lighthouse)
Business Impact
Bottom-up Development
Regularly analyze competitor services to discover UX improvements and proactively propose them.
- Introduced Depth Chart → Enhanced trade visualization
- Mobile Simple Layout → BUY/SELL click events per user 7 → 12 increase
Data-Driven Decision Making
Built quantitative evaluation metrics through Google Analytics report automation.
- Weekly/Monthly traffic report automation
- User behavior pattern analysis dashboard
Experience
D&S Ever Co., Ltd.
Full-time
Dev Team
Jun 2025 - Feb 2026
- KYC (Know Your Customer) identity verification service internalization
- AI-powered service structure documentation
- SPOT enhancement (BUY/SELL Indicator, Simple Layout)
- Full service maintenance
P2P TF Team
Jan 2025 - Jun 2025
- Led entire frontend from design to release as project maintainer
- Implemented Next.js SSR/ISR strategy
- Applied multi-communication methods (Axios, SSE, WebSocket)
- Designed and implemented 2FA system
SPOT Team
Jul 2024 - Dec 2024
- ProBit Global exchange service (SPOT) migration
- Full migration of 7-year qooxdoo legacy SPA to React
- Real-time socket communication optimization
- Dark mode and color theme implementation
Eazel Inc.
Full-time
Web Team
Jan 2024 - May 2024
- Admin system development for post-renewal maintenance
- Frontend performance optimization and quality improvement
- SEO optimization strategy planning and execution
Renewal TF Team
Jan 2023 - Dec 2023
- Led major tech stack transition in web service renewal project
- Socket.io-based real-time chat feature
- Stripe SDK payment system integration
Web Team
Jan 2022 - Dec 2022
- Global art project 'Gucci Garden Archetypes' page development
- Led internal developer study group
- Introduced TypeScript to main project
Projects
SPOT Exchange Migration
Frontend Developer (1 of 2)
Full migration from 7-year qooxdoo legacy to React to resolve rising maintenance costs and feature development delays
- MAU 180K → 200K (10% increase)
- Monthly events 3.6M → 4M (10% increase)
P2P Trading Service
Project Maintainer
Designed and built real-time P2P trading platform for business expansion and competitive positioning
- Led entire frontend from design to release
- Integrated multi-auth options (Passkey, OTP, etc.)
KYC Identity Verification
Solo Frontend Developer
Self-developed identity verification service using AWS Rekognition
- Planned and implemented 3-step verification flow
- Applied AI tools for structure and design
Eazel Web Service Renewal
Frontend Developer · Tech Lead
Complete renewal from vanilla JS to Next.js to resolve tech debt and improve performance
- Search index 8K → 38K pages (475% increase)
- Achieved FCP under 1 second
Side Projects
Personal learning and experimental projects.
Text-to-SQL - Natural Language SQL Converter
Personal Project
AI service that converts natural language questions to SQL and visualizes query results as charts
- Natural language to SQL conversion powered by Gemini 2.5 Flash
- Automatic chart visualization based on query characteristics (Bar/Line/Pie)
AI Chatbot - Multi Provider SSE Streaming
Personal Project
Multi Provider SSE streaming AI chatbot service using Claude, Gemini, and Groq
- Real-time streaming chat with SSE
- Multi Provider strategy (Claude, Gemini, Groq)
Review Sentiment Analysis Agent AI
Personal Project
Agent AI service for review text sentiment analysis using Google Gemini and Claude API
- Review text sentiment analysis (positive/negative/neutral)
- Sentiment score ranging from -1.0 to 1.0
AWS Rekognition Face Liveness Demo
Personal Project
Face Liveness authentication demo application using AWS Rekognition and Amplify
- Real-time face recognition and Liveness verification
- AWS Amplify UI component integration
TanStack Query v5 Strategy Guide
Personal Project
Comparative analysis of three data fetching strategies (CSR, SSR, Streaming) with TanStack Query in Next.js App Router
- CSR vs SSR vs Streaming strategy comparison
- QueryClient server/client separation pattern
Local Weather Service
Personal Project
Weather service built with pnpm + Turborepo-based monorepo structure
- Monorepo structure design (Turborepo)
- Shared UI package separation (@repo/ui)
Skills
Education
Yongin University
Management Information Systems
Certifications & Training
AI-POT (AI Prompt Proficiency) Level 1
KPC Korea Productivity Center
AWS Foundations of Prompt Engineering
AWS
AWS Technical Essentials
AWS
Review Management Automation with AWS Agentic AI
AWSKRUG
JavaScript Algorithms & Data Structures Masterclass
Udemy
Frontend Testing & Design Offline Commit
Goorm
Building Career as Product Developer Agora
Toss
Web Development Course Completion
Korea IT Academy
Tech Blog
I consistently write a tech blog to document what I learn.
