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role: Fullstack Developer focus: AI Integration | Cloud Services github: @HyunjoJung
# whoami

Fullstack developer with expertise in AI integration and cloud-based services. Currently working at a PR agency, focusing on automation systems and data-driven solutions.

> Samsung Software Academy For Youth (SSAFY) 11th - Graduated with honors
> Interests: Fullstack Development, AI Integration, Cloud Services
> Certified Big Data Analyst (2023)
# Personal Projects

Production-ready applications built with modern tech stacks

> SheetLink LIVE

Free online tool to extract hyperlinks from Excel files and merge Title + URL columns into clickable links.

• No server storage - all processing in-memory (privacy-focused)
• Supports .xlsx/.xls formats with DocumentFormat.OpenXml
• Built-in health checks and Prometheus metrics
• CI/CD with GitHub Actions → Docker Hub → Self-hosted Ubuntu
ASP.NET Core 10 Blazor Server Docker OpenXML
Live Demo → Source →
> CardMaker LIVE

Stateless business card generator that transforms Excel employee data into PowerPoint cards with QR codes for vCards.

• Database-free design - no persistent storage
• QR code generation with vCard data embedding
• Formatting preservation via OpenXML SDK
• Security-first: CSP headers, rate limiting, health checks
ASP.NET Core 10 Blazor Server OpenXML QRCoder
Live Demo → Source →
# Professional Experience

Enterprise-scale projects at a PR agency

> Community & Newsroom Monitoring Platform
client: Global Electronics Company

Automated monitoring system for 12 Korean communities and 59 global newsrooms. AI-powered classification (GPT + keyword analysis) categorizes posts by product categories.

• Real-time crawling with Playwright/Puppeteer browser automation
• Weekly Excel reports with automatic categorization
• Desktop app (Electron + NestJS + React)
NestJS TypeScript Electron Playwright OpenAI GPT
> News Collection Automation System
client: Global Game Publisher

Serverless news aggregation system collecting 300+ daily articles from Naver API, Google RSS, and 240+ game/IT news sites.

• AWS Step Functions orchestrating 8 Lambda functions
• Parallel crawling (Map State: 40 concurrent sites)
• Automated daily email reports with statistics dashboard
AWS Lambda Step Functions DynamoDB Node.js Terraform
> News Parsing SaaS API
client: Internal PR Tool

Serverless API service for parsing 698 Korean news sites and community platforms. 3-tier Lambda architecture (Router → CSR/SSR) optimized for cost efficiency.

• Auto-detection of CSR (21 sites) vs SSR (677 sites)
• 87% cost reduction (SSR: 512MB, CSR: 2GB separation)
• Admin dashboard for 698 domain management
AWS Lambda API Gateway DynamoDB Puppeteer Terraform
# Tech Stack
> Backend / AI
Python C# .NET Django Flask NestJS AWS OpenAI PostgreSQL
> Frontend
React Vue.js TypeScript Blazor
> DevOps & Tools
Docker Terraform GitHub Actions Cloudflare
# Awards & Certifications
2024.12

Outstanding Graduate Award

Samsung Software Academy For Youth (SSAFY) 11th

2024.11

Excellence Award - Logistics Automation

Samsung SDS Partnership Project

2024.10

Excellence Award - AI Auto Labeler

Samsung Electronics VD Partnership

2024.05

Grand Prize - FINFO Platform

Financial Comparison Service

2023.12

Big Data Analyst Certification

Korea Data Agency

# Research Publications
> CNN-based Apartment Price Prediction
Korea Society of Computer Information
> Music Investment Prediction using LSTM
Korea Information Processing Society
hyunjo@dev ~/about $