책임감과 실행력을 바탕으로 프로덕트를 지속적으로 개선하는 SW Engineer 유진입니다.
안드로이드 개발을 강점으로 시작해 백엔드와 클라우드까지 확장하며,
기능 구현을 넘어 사용자 경험과 운영 안정성을 함께 고민해왔습니다.
사용자 피드백과 실제 운영 이슈를 바탕으로 문제를 정의하고,
적절한 기술과 도구를 선택해 지속 가능한 해결 방식으로 연결하는 것을 중요하게 생각합니다.
- Strong in Kotlin, Android
- Interested in Backend, Cloud Infrastructure
2025.07 ~ 2025.09 | Android Engineer Intern, Mobility Business
- Built an Android Mock GPS tool for TMAP AUTO debugging and test automation
- Improved large driving log parsing performance by 50.6% through buffer tuning, batch processing, and regex simplification
- Designed a Room-based local caching structure for stable offline scenario replay
- Resolved rendering issues in Compose-WebView integration
- Implemented BLE communication for HUD devices using Command Queue and byte-level protocol handling
Tech Kotlin Compose Multi-Module Build Logic Room BLE Hilt JUnit
2024.09 ~ 2024.12 | Android Engineer Intern
- Developed a virtual e-bike app to simulate BLE communication without physical hardware in demo environments
- Replaced legacy
Thread.join()flow with Coroutines, reducing UI blocking from 250ms to 0.5ms - Ensured stable background BLE communication using Foreground Service
- Implemented user-facing features such as goal setting and achievement rate visualization
- Improved home screen responsiveness with Datastore caching and background refresh
Tech Kotlin XML Compose BLE Service Coroutine
2023.06 ~ 2023.08 | Backend Engineer Intern
- Developed a payment detail parsing API for G-Market settlement data
- Processed unstructured HTML/JSON data into normalized fields and stored them in MongoDB
- Verified parsing edge cases with Pytest-based TDD
- Experienced collaborative backend development through pair programming and code reviews
Tech Python Selenium BeautifulSoup Flask MongoDB
2023.03 ~ Present | Android Developer / Former Team Leader, PM, AWS Infra Operation
A campus meal review service used by 5,000+ users at Soongsil University.
- Improved WAU/MAU from 21.8% to 62.4%
- Built a stable operation workflow with Crashlytics + Slack, resolving 15+ major crashes
- Automated release workflow with GitHub Actions + Fastlane
- Solved JWT refresh race condition with
Mutex, reducing duplicate refresh attempts to one - Re-architected legacy code into MVVM + Clean Architecture, with gradual Multi-Module / Compose migration
- Introduced Firebase Remote Config and background updates with WorkManager to improve operational flexibility
- Contributed to backend and infra improvements, including query optimization and AWS operation
Tech Kotlin XML Compose Clean Architecture MVVM Hilt Retrofit Coroutine Flow WorkManager Firebase Fastlane AWS
2024.07 | Personal Project
A book registration automation tool built during an overseas volunteer project in Indonesia.
- Automated the flow from ISBN scan → book lookup → Google Sheets save
- Reduced registration time per book from 1 minute to 10 seconds
- Designed the system for immediate use by non-developers with Google Sheets as a lightweight DB
- Built and applied the prototype in a constrained field environment
Tech Kotlin ZXing Google Books API Google Sheets API Apps Script
- K-PaaS Digital Social Innovation Contest — Gold Prize (2nd)
- AI Online Development Competition Syncathon Season 3 — Grand Prize (2nd)
- Soongsil University Software Contest — Gold Prize
- Soongsil Capstone Design Competition — Encouragement Prize
- Speaker: 학교에서 서비스 운영하기
- Speaker: 해외봉사가서 개발하기
- Vice Lead of a 50-member university IT club
- Co-hosted the first SSU DEVCON with 6 campus IT clubs and 400 participants
- B.S. in Computer Science, Soongsil University (2021.03 ~ 2025.08)
- 정보처리기사 (2024.12)
- SQLD (2025.12)
- GitHub: https://github.com/HI-JIN2
- Velog: https://velog.io/@jini_1514
- Email: qldls0307@naver.com