이경찬 (Kyoung-chan Lee)

• Software Engineer at LINE (May 2017 - Present)

Links

• Github
• Linkedin
• Facebook

Experiences

• Software Enginner at Path (January 2016 – May 2017)
  • Scalable API servers that handle 10 million monthly active users.
    • Technology stack: Python, uWSGI, Memcached, Redis, twemproxy, MongoDB, gevent, etc.
      
      
• CTO at Add2paper (May 2012 – December 2015)
  • Web application backend
    • Technology stack: Python, Django, MySQL, Nginx, Gunicorn, Memcached, Celery, Redis, Supervisor (Detailed post in Korean)
    • Management system for advertisers
    • Billing system for printer managers
    • API backend for iOS/Android Application
    • API backend for windows client
  • Log aggregation backend
    • A simple log aggregation backend built with Google App Engine, Python, webapp2
    • This backend receives and saves all logs generated from Add2paper mobile applications and windows client.
  • iOS & Android Application
    • Hybrid application using HTML / CSS / Javascript and partial native codes
  • Windows client with virtual printer driver
    • V1.0.0 ~ V2.5.2: C++, MFC
    • V3.0.0 ~ V3.2.1: C++, C#, .Net Framework 4, CEF
    • V4.0.0 ~: C++, C#, .Net Framework 4
  • TCP server for copy machines (authentication/payment)
    • TCP server for legacy firmwares which do not support HTTP connection
    • Python, gevent
      
      
• Personal projects
  • accounting - money and currency formatting for golang. (2015)
  • timeutil - useful extensions (Timedelta, Strftime, ...) to the golang's time package. (2015)
  • gtf - gtf is a useful set of Golang Template Functions. The goal of this project is implementing all built-in template filters of Django & Jinja2. (2015)
  • phPy - A simple way to call legacy PHP functions from Python (2012)
  • KUSearch - A simple search engine for Korea university students (2009)
    • Crawler: Python, Beautifulsoap
    • Indexer: Python, Whoosh
    • Frontend: Python, Django
  • KUSearch lite - GAE version of KUSearch (2010)
    • Google App Engine, Python, Webapp2, Datastore
    • It builds a simple inverted index using n-gram tokenizer and GAE datastore
  • liteweb - A light weight Python ORM Web Framework (2010)

Education

• BS in Electrical and Electronics Engineering, Korea University

Languages

• Korean: Native
• English: Working proficiency