Hyunjun Kim
Head Of Ads Tech at Toss
Seoul, South Korea
Summary
🤩
Rockstar🎓
Top SchoolHyunjun Kim is a seasoned engineering leader with 15 years of experience building high-scale consumer and financial platforms, now serving as Head of Ads Tech at Toss in Seoul. He has driven major architectural rewrites and product launches—rebuilding ads and recommendation systems, leading commerce platform efforts for a 30M+ superapp, and owning core payments, credit and brokerage services. Equally comfortable in strategy and hands-on execution, he has implemented real-time feedback collectors and improved CDC-based data pipelines that underpin ML-driven personalization. A former founding engineer/CTO at fast-growth startups and early contributor to LINE’s Clova voice platform, he blends startup agility with large-scale production rigor. His open-source work improving SQLAlchemy resources shows attention to developer experience and discoverability beyond his day job.
15 years of coding experience
12 years of employment as a software developer
Bachelor of Engineering - BE, Computer Science and Engineering, Bachelor of Engineering - BE, Computer Science and Engineering at Hanyang University
Japanese, Korean, English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (7)
sqlalchemy10
python10
documentation10
lists7
databases6
database6
orm5
Programming languages (12)
Github contributions (5)
dahlia/awesome-sqlalchemy
Sep 2014 - Oct 2014
A curated list of awesome tools for SQLAlchemy
Role in this project:
Technical Writer
Technical WriterContributions:10 commits in 21 days
Contributions summary:Hyunjun primarily contributed to the project by updating the `README.rst` file. Their commits focused on adding and updating hyperlinks to external resources and providing deeper links to specific tools within the SQLAlchemy ecosystem, such as Amazon Redshift, Sphinx, RDFLib and others. They also added new entries like recipes and framework integrations. These changes indicate an effort to improve the discoverability and usability of the project's resources.
pythonrdbmssqlalchemysql-databasesql
yoloseem/vict-lang
Oct 2010 - Jun 2015
Contributions:62 commits, 2 pushes in 4 years 8 months
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