Byungjoon Lee
Staff Engineer at Coupang
Gyeonggi, South Korea
Summary
👤
Senior🎓
Top SchoolByungjoon Lee is a Staff Engineer and Node.js/TypeScript full-stack expert with eight years of experience designing and operating high-traffic backend systems and RESTful APIs, notably for Yanolja and current WMS work at Coupang. He architects scalable services using Express/Fastify, Redis, MySQL/Aurora, ElasticSearch and Kafka, and automates developer workflows with JSON Schema, Swagger and TypeDoc. A hands-on technical lead, he bridges infra and product needs—setting up TypeScript-first project scaffolding and tuning systems for production traffic. Active in open source and technical speaking, he maintains a public dev portfolio and blog that reflect deep practical knowledge of JavaScript ecosystems. Unusually, he remains focused on JavaScript/TypeScript as his primary stack while expressing curiosity about Kotlin, Rust and data-focused languages like Go and Scala.
8 years of coding experience
13 years of employment as a software developer
Master's degree Computer Engineering, Master's degree Computer Engineering at Pusan National UniversityBachelor's degree Computer Science, Bachelor's degree Computer Science at 경성대학교 / Kyungsung University
English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (2)
rollupjs9
typescript5
Programming languages (2)
Github contributions (2)
imjuni/create-ts-index
Nov 2017 - Jan 2018
Automatic create index file for TypeScript
Contributions:12 commits, 2 comments in 2 months
typescriptrollupjsindex
yanolja/yanolja-cx-work-logger
Sep 2018 - Sep 2018
CX실 근무시간 측정기
Contributions:1 branch in 1 day
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