JunHaeng Lee

JunHaeng Lee

Software Engineer in Seoul, They/them

About

Software engineer with 17+ years of work experience in backend, frontend (web/mobile) development technical writer with 10+ years

Contact

Twitter
LinkedIn
Facebook

Work Experience

2023 — 2023
Senior Software Engineer at Iamdt
Seoul, Korea
  • Replacing legacy systems developed in Python and FastAPI with nodejs, React, and Typescript.

  • Developing design systems with TypeScript with designers.

  • Developing a system for sending real-time notifications and synchronizing data in a multi-client environment using WebSocket/socket.io

2021 — 2022
Seoul, Korea

As team leader of music dev team, led the dev team and developed the following products.

  • Content management system for music streaming service
  • Network architecture for importing music resources from partner distributors
2020 — 2021
Seoul, Korea

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
2016 — 2020
Seoul, Korea

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
2015 — 2015
London, UK

As lead developer, developed the following products.

  • Content management system for journalist
  • Donation/funding payment system with Stripe
  • Managed outsourcing developers
2013 — 2015
Seoul, Korea

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
2011 — 2012
Seoul, Korea
  • Developed PaaS service like Heroku, Vercel
  • Developed social comments plugin like Disqus
  • Developed mobile messenger for k-pop fans like Weverse.
2010 — 2011
Seongnam, Korea
  • Developed web-frontend performance optimizing guideline
  • Developed outsourced code quality verification system
2007 — 2008
Seongnam, Korea

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

Side Projects

2024

vinyl.coroke.net is a service where you can check the vinyl records released by artists and find record shops that sell them. This service made with SvelteKit, Django-ninja.

2023

Forum services that mimic 1980s VT networks, such as Compuserve or NIFTY-Serve, on the web browser.

2023

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

2022

RSS reader client for CLI(Command Line Interface), spinned off from rterm.

2022

CLI file manager with S3 and Kubernetes inspired from Pctools, Norton Commander and Mdir.

2020

Twitter / RSS reader client for CLI(Command Line Interface).

Writing

2015

Technology & Society

2013

Technology & Society