Yu Usami
Principal Architect at freee.k.k.
Yokohama, Japan
Summary
🤩
Rockstar🎓
Top SchoolYu Usami is a Principal Architect with 15 years of experience building scalable web and data systems across startups and SaaS companies, currently shaping architecture at freee in Yokohama. He combines deep hands-on expertise in Ruby on Rails, Python, Java and data science with production-grade experience at CircleCI, Rainforest QA and earlier roles powering mobile backend and search at Wildcard. A Columbia CS M.S. graduate, Yu has delivered robust API platforms, search systems and ML-enabled data extraction tools that scaled to thousands of categories and high-traffic apps. Known for bridging research and engineering, he brings a pragmatic, measurement-driven approach to architecture and a history of optimizing performance and operational reliability.
15 years of coding experience
13 years of employment as a software developer
University of TokyoMaster of Science (M.S.), Computer Science, GPA 3.79 / 4.00, Master of Science (M.S.), Computer Science, GPA 3.79 / 4.00 at Columbia University - Fu Foundation School of Engineering and Applied Science
Japanese, English
Stackoverflow
1reputation
0reached
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0questions
Github Skills (55)
nltk10
api-blueprint10
circleci10
redoc10
api-documentation10
jekyll10
documentation10
nlp9
python8
natural-language-processing8
machine-learning8
linter7
chrome-extension7
neovim7
language-server7
Programming languages (5)
Github contributions (5)
usami/nixos-setup
Dec 2018 - Oct 2020
Contributions:53 pushes, 3 branches in 1 year 9 months
usami/linkjp_scorer
Apr 2021 - May 2021
Contributions:23 commits, 6 pushes, 1 branch in 1 month
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