ungi@ungikim.me · github.com/ungikim · Seoul, Korea
Building scalable backend systems, optimizing big data pipelines, and improving developer experience for global platforms
Mar 2022 – Present, Seoul, Korea
Led product development and continuous improvement for game platform administration and operations
Key Impact:
- Led product planning, technical direction, and team execution for gaming business operations tooling
- Executed server and data center relocation, including development, monitoring, and failure resolution
- Managed procedural changes and compliance requirements across products
- Maintained and improved internal libraries used across platform services
Tech: Backend infrastructure, operational tooling
Feb 2020 – Mar 2022, Tokyo, Japan
Built scalable authentication and payment systems for game platform services
Key Impact:
- Designed multi-platform token system to improve authentication reliability
- Enhanced shared storage library used across infrastructure
- Delivered subscription payment system enabling revenue streams for game developers
Tech: Authentication systems, storage libraries, payment integration
May 2016 – Nov 2019, Seoul, Korea
Built backend services and data infrastructure for True Balance, a fintech app serving millions of users during the company's Balance Hero period
Key Impact:
- Designed and scaled batch processing pipeline for 10M+ users' financial data
- Created self-service PySpark aggregation framework, improving analyst productivity by 70%
- Developed custom Athena interpreter for Zeppelin to enable interactive data exploration
- Designed and implemented event-driven promotion engine for high-volume user campaigns
- Built user management microservice supporting millions of concurrent fintech users
Tech: PySpark, AWS Kinesis, AWS Athena, Apache Zeppelin, ETL pipelines, event-driven architecture, microservices
Dec 2015 – Feb 2016, Seoul, Korea
Apr 2010 – Feb 2013, Seoul, Korea
Developed e-commerce platforms for major Korean retail websites
Key Impact: Built and maintained GEOPASS and eBay Auction e-commerce systems
Tech: E-commerce platforms, web development
Mar 2009 – Feb 2016
Bachelor of Computer Science and Engineering
- "Data Engineering 101" @ Kodeveloper Struggle #39, CUK Special Lecture (materials)
- "Simplify Data Processing" @ DatayaNolja 2018 (materials)
- Featured in LINE Careers "Meet the Global LINERs"
- 🇰🇷Korean (Native)
- 🇺🇸English (Professional)
- 🇯🇵Japanese (Professional)