Mentor of Software Maestro program by the Ministry of Knowledge Economy, Republic of Korea.
Mentor of Winter of Code.
Maintained Dodo, an extremely simple iPad based customer loyalty and marketing platform for local merchants and stores. Merchants can market to customers via the Dodo platform when they check in with their phone number at the counter.
Backend server. [Technologies: Python, Flask, SQLAlchemy, Celery, PostgreSQL, Redis, Fabric, Linux]
Built Beat, and Android music player app that helps you not only to listen to music on your smartphone, but to make playlists on your own by finding your favorite songs.
Android application. [Technologies: Java, Android, Maven]
Backend server. [Technologies: Python, Flask, SQLAlchemy, Celery, PostgreSQL, Redis, Fabric, Linux, Amazon Web Services (EC2, S3, SQS, ElastiCache, Route 53, CloudFront)]
Crosspop is a social platform where anyone can enjoy creating comics/mangas, share and browse them, and connect with other artists and enthusiasts.
Self-employed as a founder. [Technologies: Python, Flask, SQLAlchemy, Celery, PostgreSQL, Memcached, jQuery, SCSS, Fabric, Linux, Amazon Web Services (EC2, S3, SQS, ElastiCache, SES, Route 53, CloudFront)]
Tipforest is a collaboratively edited open database project.
Worked as programmer. [Technologies: Python, Django, Jinja, PostgreSQL, Heroku]
StyleShare is a social network service for fashion lovers.
Worked as CTO. [Technologies: Python, Flask, SQLAlchemy, Celery, gevent, PostgreSQL, RabbitMQ, Memcached, Redis, jQuery, SCSS, Fabric, Linux, Amazon Web Services (EC2, S3, Route 53, CloudFront)]
Olaworks is a computer vision based company that focuses on facial recognition technology/service.
Maintained ScanSearch, a social network service based on augmented reality technology. [Technologies: PHP, MySQL, Linux]
CDNetworks provides technology, network infrastructure and customer services for the delivery of Internet content and applications.
Set and maintained a distributed and scalable monitoring system that manages about a million server nodes of CDNetworks. [Technologies: Python, Tokyo Cabinet, PostgreSQL, Linux]
Set and maintained VLAAH, a social network service for discovering, sharing and utilizing opinions. [Iteration: 1st, Technologies: PHP, PostgreSQL, PL/pgSQL, Memcached, MooTools, Linux] [Iteration: 2nd, Technologies: Python, SQLAlchemy, Werkzeug, Jinja, PostgreSQL, PL/pgSQL, Memcached, jQuery, Linux]
Set and maintained Hantweet, a service that helps Korean users to tweet texts through SMS. [Technologies: Ruby, Rails, MySQL, Java, Linux, Heroku]
Nielsen Company is a global marketing and advertising research company.
Maintained KoreanClick which provides measurement and analysis of online audiences, advertising, video, consumer-generated media, commerce and consumer behavior. [Technologies: PHP, Oracle, Pro*C, PL/SQL, Memcached, MooTools, HP-UX]
Maintained Searchian which provides keyword suggestion for search marketing, analysis of keyword advertising platforms and measurement of keyword usage. [Technologies: Python, SQLAlchemy, Tornado, Jinja, Oracle, PL/SQL, jQuery, Linux]
Worked as a substitute of mandatory military service.
Maintained Olalog, a photo sharing social network service based on facial recognition technology. [Iteration: 1st, Technologies: Ruby, Rails, PostgreSQL, Prototype, scriptaaculouus, Linux] [Iteration: 2nd, Technologies: PHP, MySQL, Prototype, scriptaaculouus, Linux]
Retired to do liability for military service.
Simple SSH key management service which helps to maintain servers to SSH, and
authorized_keys list for them.
News reader that is possible to run on various devices and be synchronized without any particular centralized proprietary services.
Deployment system for Python web apps using GitHub and Amazon Web Services.
SCSS for Python.
Persistent object library based on Redis.
ctypes-based simple ImageMagick (a widely-used image processing library) binding for Python.
Python module that introduces futures and promises (theoretical concepts of concurrent programming) into iterators and generators.
Lisp dialect written in PHP.
The above list contains only representative projects founded by me. My detailed open source activities can be found in my GitHub and Bitbucket.
Founder of LangDev, a forum for programming language designers and compiler implementors.