Dongsu Jang

TL;DR

APPLE ][+ Kid, Fool-stack software engineer from Desktop, Mobile, Web Frontend to Backend, and Data Engineering.

2018.08-2023.04 CTO, Fastcampus, became Day1 Company
- Fastcampus: online/offline/mixed education services for personal customers
- Fastcampus for Business: online education services for enterprise customers
- coloso.co.kr, coloso.us, coloso.jp/: multiligual(korean, japanese, english) online education services
- zero-base.co.kr: online/offline/mixed education services with LMS, and career management, recruiting
- and 10+ various online education services
2017.04-2018.06 Tech Lead, Lezhin Entertainment
- Lezhin Comics: a multilingual(korean, japanese, english) webtoon web & mobile service
2014.01-2017.04 Tech Lead & S. Engineer, Daum Communications, became Kakao
- Log pipelines for Daum Cafe
- Open Comment platform for Daum and Kakao services
- Tistory Mobile for Android with WYSIWYG content editor
2010.03-2013.03 Tech Lead & S. Engineer, KT Hitel, became KT Alpha
- Appspresso: hybrid mobile application platform and SDK
- I’m In: location based social media web & mobile service
- PuddingFace Mobile for iOS(International) and Android
2007.05-2009.10 Tech Lead & S. Engineer, Thinkfree, became Hancom
- Thinkfree Office Live: web-based office productivity application suite similar to Google Drive and Microsoft Office 365 nowadays.
and so on…

Java, Kotlin, Spring, Tomcat, …
JavaScript, TypeScript, Node.js, Express.js, Nest.js, Knex, …
Next.js, Nuxt for SSR
React, Vue, Angular for SPA
AWS, GCP Cloud Infrastructures
MySQL, Oracle, Informix, and Mongodb Databases
Hadoop, HBase, Spark and Elasticsearch for Log Pipelines
Android, iOS, and Hybrid for Mobile App Development
Swing, SWT, Eclipse RCP for Java Desktop Application Development
GTK, Motif for Linux Desktop Application Application Development
MFC, Win32, DirectX for Windows Desktop Application Development
and…
APPLE ][+ BASIC, 6502 Assembly, UCSD Pascal, Turbo Pascal, BDS-C, …
GW-BASIC, 80x86 Assembly, dBASE, Clipper, Lattice C, RM COBOL, WATFOR-77, Turbo C, Borland C++, Delphi, Visual C++, Visual Basic, …

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