As tech lead, led the dev team and developed two products.

• mago.works, Content publishing platform CMS project for asian media publisher
• bloom, Online donation platform for Korean media publisher

As co-founder, CTO, developed the following products.

• Content management system for vertical pay-walled media
• Rich-format WYSIWYG web editor for media publisher
• Webtoon content management system
• Slack chatbot for content publishing and corporate indicator analysis
• Interactive content builder, chart builder like thepin.ch/numbers
• Event ticketing system like Eventbrite
• Newsletter management system with Mailchimp
• Subscription billing management system with credit card and in-app purchase

As lead developer, developed the following products.

• Content management system for journalist
• Donation/funding payment system with Stripe
• Managed outsourcing developers

As software engineer, developed the following products.

• ilwar.com (2013 ~ 2015)
  Web forum service, 300,000 DAU
• indistreet.com (2013 ~ 2015)
  Gig guide service which provides news and 
show schedules of indie musicians of Korea
• boooki.com (2013 ~ 2015)
  Web service for keeping personal book records
• news.coroke.net (2013)
  News curation service from independent media in Korea
  with server made by raspberry pi

• Developed PaaS service like Heroku, Vercel
• Developed social comments plugin like Disqus
• Developed mobile messenger for k-pop fans like Weverse.

• Developed web-frontend performance optimizing guideline
• Developed outsourced code quality verification system

openmaru studio
As product manager knows software engineering, made following products.

• springnote.com, a co-working document editing service
• lemonpen.com, a web highlighting & clipper service

writersclub is an online publishing platform where you can only write plain text without images, videos.