I’m a backend engineer who enjoys building services with a focus on optimization and AI integration.
- Languages: Java, Python, SQL
- Frameworks: Spring Boot, Spring MVC, JPA
- Databases: MySQL, Redis
- DevOps: AWS EC2, RDS, S3, Docker, GitHub Actions
- Testing: JUnit5
- AI Tools: YOLOv5, GPT-3.5, koBERT
- Email: [email protected]
- GitHub: github.com/pyounani
- Blog: pyounani.tistory.com
- Portfolio: View Portfolio
A location-based team matching web service for study & projects.
- Tech Stack: Java 17, Spring Boot 3.2, MySQL, Redis, AWS (EC2, RDS, S3), Docker
- Key Contributions:
- Response time improved from 920ms → 180ms through indexing
- API response time improved from 480ms → 60ms with Redis caching
- Memory usage reduced by 35%, optimized GC behavior
- Handled full API design, deployment, AWS infrastructure
An AI-powered interactive English story app for children.
- Tech Stack: Java 17, Spring Boot, MySQL, Redis, AWS, Docker, GitHub Actions
- Key Contributions:
- Implemented JWT-based login with social login support
- Solved S3 data consistency issues with custom file management
- Improved TPS from 21 → 61 through ThreadPool & HikariCP tuning
- Achieved 80% test coverage with 175+ unit tests
A safe SNS app for young students with AI-based content filtering.
- Tech Stack: Java 11, Spring Boot, MySQL, AWS, YOLOv5, GPT-3.5, koBERT
- Key Contributions:
- Developed image masking and text filtering features
- Designed and refactored backend API with DTO-based responses
- Improved performance using Fetch Join to avoid N+1 issues
- Built auto-comment generation with GPT-3.5 + Amazon Rekognition
Thanks for visiting! 😊