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Jongwook Kim, Java Developer in Seattle, WA, United States
Jongwook Kim

Java Developer in Seattle, WA, United States

Member since November 4, 2015
With over a dozen years of experience, Jongwook develops simple and robust software that delivers value to customers. Jongwook believes that showing the client a working software first and evolving that product together is important to the development process, so he welcomes changing requirements. He enjoys problem solving and communicating with motivated individuals.
Jongwook is now available for hire

Portfolio

Experience

  • MySQL, 6 years
  • Java, 6 years
  • Python, 3 years
  • Hack, 2 years
Seattle, WA, United States

Availability

Part-time

Preferred Environment

PHP, Python, Linux, Git, Spark

The most amazing...

...project I’ve worked on involved gathering user feedback and modeling a rank algorithm for a social search collection.

Employment

  • Software Engineer

    2016 - PRESENT
    Facebook
    • Worked as a solutions engineer for Facebook in Korea. Consulted Korean advertisers to adopt and utilize Facebook marketing solutions such as Dynamic Ads, Pixel, and App Events in order to achieve business objectives.
    • Designed and implemented a new plugin API that helps engineers extract strings to be translated for the purpose of i18n from various sources such as code repositories, database, and files.
    Technologies: PHP, React
  • Team Lead

    2008 - 2015
    Kakao
    • Implemented a blog post ranking algorithm using bloggers’ trusts, which was computed by their recommendation histories.
    • Created a personalized blog post feeder on Lucene.
    • Modeled news and image collection ranking algorithms.
    • Led a team to create a buzz search service from scratch, which gathers and evaluates users’ reactions to finding issues and related content.
    • Led a team that focused on developing search keyword services, including auto-completion, query suggestions, and trends.
    Technologies: Spark, Scala, Python, Java
  • Software Engineer

    2006 - 2008
    Naver
    • Adopted Agile methodologies to decrease bugs and service failures.
    • Integrated Java frameworks such as Spring, iBatis, and FreeMarker.
    • Automated server managing and service deployment using Bash.
    • Implemented network servers for communicating with game servers and backed up authentication Oracle servers by using a memory database instead.
    • Worked as the technical lead for Hangame's web development center.
    Technologies: Java, Spring, MySQL
  • Web Developer

    2002 - 2006
    SK Communications and Unitel
    • Implemented a common JavaScript library based on Prototype.js.
    • Developed websites using Struts and MySQL.
    • Maintained and improved websites for online photo prints, online movies, and P2P sites as a lead developer.
    • Implemented a back-end server with pooling sockets from clients and synced events with an external server.
    • Worked with the Cyworld development team.
    Technologies: Java, JavaScript

Experience

  • Task Management System (Development)
    https://github.com/fantazic/tms

    This web app is a private project for task management that is based on Django, SQLite, and Vue.js. All functions are covered by unit tests and functional tests.

  • Online Parser (Development)
    https://github.com/fantazic/online-parser

    This is a private project for parsing TSV files. The project uses web sockets for bidirectional data handling. The Tornado web server is used for the back-end web socket, and AngularJS is used for the front-end.

  • How to Create a Simple Python WebSocket Server Using Tornado (Publication)
    The threaded model and global interpreter lock has always been in the way of Python handling thousands of concurrent long-lived connections. Modern web frameworks, such as Tornado, use non-blocking network I/O to make Python feasible for implementing WebSocket servers. In this article, Toptal engineer Jongwook Kim walks us through the process of implementing a simple WebSocket-based web application in Python using the Tornado web framework.

Skills

  • Languages

    Hack, SQL, Python, Java, Scala, JavaScript, CSS
  • Storage

    MySQL, Redis
  • Frameworks

    Machine Learning, Apache Spark, Hadoop, Spring, Django
  • Libraries/APIs

    React, jQuery
  • Tools

    Git
  • Paradigms

    Data Science, Agile Software Development, Concurrent Programming
  • Other

    Leadership, System Architecture
  • Platforms

    AWS EC2, Linux

Education

  • Bachelor's degree in English Language and Literature
    1995 - 2002
    Yonsei University - Seoul
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