🚀 Backend developer passionate about building robust, scalable services.
Have hands-on experience in AI-powered commerce solutions and high-traffic service architecture.
Especially interested in digital healthcare 🏥, mobility 🚗, and commerce services 🛒.
Focused on problem-solving and service quality, leveraging a diverse tech stack and strong collaboration skills.
- Developed and operated the backend for Pick2Sell, an AI-powered semi-automatic purchasing tool.
- Built API servers integrating Korean open markets and Chinese sourcing malls.
- Developed core commerce features: product data collection, image translation/processing, order and delivery management.
- Enhanced service stability and handled high-traffic scenarios.
Key Projects
- ⚡️ AI Image Processing Server Autoscaling: Improved processing speed by 230% with RabbitMQ-based autoscaling.
- 🌐 Unified External Product Data Fetching: Achieved 99.99% success rate by integrating OpenAPIs and mirror servers.
- 🧩 Order Feature Stabilization: Standardized order APIs and achieved 0 VOC.
- 📱 Mobile App Backend & Project Management: Released mobile app MVP in 3 months with 4.9 app store rating.
- Maintained and developed backend systems for Korea’s leading food delivery platform.
- Led and contributed to marketing admin, coupon, review, and order microservice projects, collaborating in a global and cross-functional environment.
Key Projects
- 🏷️ Marketing Admin Service Development : Developed admin tools for marketers (coupon, store coupon); improved slow query performance from 15s to 4s (70% faster) and managed a team of four Vietnamese developers.
- 🎟️ Coupon Domain Development & Maintenance : Built regional targeting coupon features for marketing cost optimization and developed pause functionality, saving 10% of weekly backend developer resources.
- 📝 Review Microservice Migration & Maintenance : Developed new menu review services; designed DB schema for legacy compatibility and contributed to a 10% increase in total reviews.
- 🛒 Order Microservice Development & Maintenance : Separated user-facing order APIs and refactored legacy codebase.
- 🎁 Integration with External Gift Service : Streamlined authentication and developed API handlers for external gift service integration.
- Backend: Python (Django, FastAPI, Celery), Java (Spring, Spring Boot, Spring Batch), TypeScript (NestJS)
- Containers: Docker 🐳, Kubernetes ☸️
- Cloud & Infra: AWS (EC2, ECS, EKS, S3, SQS, SNS, Lambda, MQ, Elasticache, Elasticsearch, EventBridge)
- Databases: PostgreSQL, MySQL, DynamoDB, Redis, Elasticsearch
- Monitoring: Grafana 📊, Kibana, New Relic, Datadog
- Collaboration: Slack 💬, Confluence, Jira, OpsGenie, G-Suite, Notion
- 📖 Technical book studies (Head First Design Patterns, Microservices Patterns, Clean Code, Effective Python 2nd, Docker/Kubernetes)
- 🏅 Completed in-house retrospective facilitator training program
- 👨🏫 Instructor for Linux & Django at SeSAC AI Developer Training (lecture rating: 4.6/5.0)
- 💻 42 Seoul: Advanced Linux/networking with C, C++
- 🗨️ Naver Campus Hackday 2020: Developed Naver TalkTalk Android app
- 🛠️ Side projects: YamApp, Toontime (up to 1,000 MAU)
- 🎓 Yonsei University, Mirae Campus – B.Eng. in Computer Engineerings
- 🏅 Engineer Information Processing (2019)
✨ Thanks for visiting! ✨