Junior Backend Developer specializing in Java & Spring Boot.

Interested in transaction consistency, concurrency control, event-driven architecture, and scalable backend systems.

• Java
• Spring Boot
• Spring Security
• JPA / Hibernate

• MySQL
• Redis
• AWS(EC2 / RDS)

• Kafka
• Redisson

• Docker
• GitHub Actions
• IntelliJ IDEA
• VS Code
• Postman

Hybrid e-commerce platform combining a Coupang-style marketplace with a seller onboarding system, focused on concurrency control, event-driven architecture, and AI-powered shopping features.

Tech

• Spring Boot
• Redis / Redisson
• Kafka
• MySQL
• Docker
• AWS

Contribution: Designed and implemented the cart, order, payment, coupon, and notification domains, including multiple concurrency-control strategies

E-commerce backend platform focused on concurrency control, Redis caching, and coupon/time-sale systems.

Tech

• Spring Boot
• Redis
• MySQL
• Docker
• AWS

Contribution: Team leadership, JWT authentication, AWS infrastructure, and CI/CD

Multi-server coffee ordering system focused on Redis-based distributed locking, Redis ZSet-based ranking, and Kafka-based asynchronous event processing.

Tech

• Spring Boot
• Redis
• Kafka
• Docker

Contribution: Designed and implemented the complete backend system

• React and frontend fundamentals for full-stack service development
• Spring AI (LLM integration, tool calling)
• Monitoring & Incident Response (Prometheus, Grafana)
• Advanced Performance Analysis and Load Test Result Interpretation

• Velog: https://velog.io/@jhsky3118/posts
• Backend Portfolio: https://github.com/doksakim7/backend-portfolio