Backend software engineer with 5+ years in Java and Spring, plus iOS work in Swift. I build distributed, event-driven services and I'm currently deepening my system design and distributed-systems skills (working through Designing Data-Intensive Applications).
Stack
- Languages: Java 21, SQL, Python, TypeScript, Swift
- Frameworks: Spring Boot, Spring MVC, Spring Data JPA, Hibernate, RxJava, Guice, React, Angular
- Infrastructure: Kafka, Redis, AWS, Spanner, MySQL, PostgreSQL, Oracle, Docker, Kubernetes, Terraform
- AI-assisted development: Claude Code, Cursor, ChatGPT, Gemini
What I've built
- Java – linebot-cinnox, a Spring Boot LINE bot that stores messages in MongoDB; sp, an e-banking microservice with JWT, Kafka and Kubernetes
- Swift – ticketC, an iOS app that tracks ticket status over MySQL using MVVM
- JavaScript / TypeScript – pingchunwu.github.io, my personal site built with Next.js; guilty-dragon-remake, a card-battle PWA