Ungi Kim

Experienced in big data processing with strong debugging skills, backend development, and startup developer.
Leverages comprehensive technical expertise for software engineering and data management.
I am interested in machine learning and open-source projects.


Data Engineer
Balance Hero Feb 2017 - Present
India-based South Korean fin-tech startup

Designed and implemented the whole Big data pipeline with batch processing

Worked with AWS and its different components

Developed Spark code in Python using Spark SQL & Data Frames for aggregation that easily used by analyst and developer

Designed and implemented the KDS consumer

Built a Apache Zeppelin Interpreter for Amazon Athena

Written queries to transform data for further downstream processing

Involved in the end to end development process

Software Engineer
Balance Hero May 2016 – Feb 2017
Developing True Balance

Designed and implemented the event based promotion service

Designed and implemented the user service

Worked with AWS to reduce infra management

Netmarble Games Dec 2015 – Feb 2016
Internship as part of the Netmarble recruitment 2015

Developed multiplay mahjong game

Software Engineer
Saerom C&C April 2010 – Feb 2013
Worked as a substitute of mandatory military service.

Developed a web server framework adapting the MVC pattern by PHP5

Maintained web sites overseas e-commerce service GEOPASS and eBay Auction


Programming Languages
  • Python
  • SQL
  • Java
  • Scala
Back-end Technologies
  • Apache Spark
  • Spring Framework
Databases or Cache Storage
  • MySQL
  • InfluxDB
  • Redshift
  • Redis
  • AWS
  • Docker
  • Linux
  • Jenkins
  • Git
  • IntelliJ
  • VS Code
Human Languages
  • Korean(native)
  • Japanese(fluent)
  • English(pre-intermediate)


Bachelor’s degree
The Catholic University of Korea Mar 2009 - Feb 2016
Computer Engineering




2018년 회고

2018년도 끝이 왔다.

데이터 처리의 단순화

데이터야놀자 2018 발표

Spark 의 Global Temporary View

데이터 사이즈 불균형으로 인한 ...

2017년 회고

어느새 2017년 마지막이 되어...

Spark 에서 S3 데이터 삽질기

AWS V4 API만 제공되는 ...

iPhone 7

어쩌다보니 한국 발매 이전에 아...

Android Internals

액티비티가 어떻게 구동되는지 알...

Android Wi-Fi State Machine

연구실 주제로 필요에 의해서 안...

주변의 AP를 찾는 방법

Wi-Fi 장비의 Scan 에 ...