Dongjun Lee
AI Lead at Toss
South Korea
Summary
🤩
Rockstar🎓
Top SchoolDongjun Lee is an AI Lead based in South Korea with eight years of hands-on experience building production-grade machine learning and NLP systems across e-commerce and legal-tech domains. He has led scoping-to-delivery efforts—from architecting RAG and conversation frameworks for a law-focused generative-AI search product to automating shopping cataloging with OCR+LLM pipelines and human-in-the-loop verification that achieved ~95% group accuracy and 98% precision on duplicate detection. Previously he grew and scaled engineering and AI teams (3→13), steered cloud and CI/CD migrations, and drove domain-specific language model pretraining and retrieval improvements that measurably lifted search accuracy. Comfortable bridging research, product and infra, he’s shipped end-to-end solutions including model serving, monitoring, and prompt engineering while collaborating closely with domain experts. A practical tinkerer with front-end experience (GitHub bio notes frontend interests), he blends system-level leadership with hands-on ML engineering to turn complex, data-rich problems into operational services.
8 years of coding experience
9 years of employment as a software developer
Bachelor of Science in Engineering Computer Science, Bachelor of Science in Engineering Computer Science at Hanyang University
Stackoverflow
11reputation
461reached
0answers
1question
Github Skills (32)
nextjs9
typescript9
react9
pdf-generation7
pdf7
react-suspense7
aws-apigateway6
frontend6
nodejs6
react-pdf6
spring-boot6
aws-lambda6
overlay6
proxy6
chrome-extension6
Programming languages (6)
Github contributions (5)
juno7803/WeatherFit
Jun 2020 - Oct 2020
날씨에 따른 옷 추천 웹
Contributions:30 commits, 21 pushes, 1 branch in 3 months
spring-bootspringjava
juno7803/uber-server
Jul 2020 - Nov 2020
uber clone server
Contributions:87 commits, 79 pushes, 1 branch in 4 months
ubernodejsuber-clone
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