Yui Matsumura
Product Manager at Helpfeel Inc.
Tokyo, Japan
Summary
👤
Senior🎓
Top SchoolYui Matsumura is a Tokyo-based product manager and former software engineer with over 17 years of hands-on experience building web, mobile, and desktop applications. Currently leading product at Helpfeel and managing projects at Nota, she blends technical fluency with product strategy—able to prototype, ship code, and steer roadmaps herself. Her background spans long tenures as an engineer at Cerevo and early Rails/Firefox work at Metacast, giving her deep practical knowledge across front-end and back-end stacks. With a Master’s in Media and Governance focused on HCI from Keio University, she brings a user-centered lens to product decisions and a knack for translating research into usable features. Not obvious from her title: she often toggles between coding and product work, making her as comfortable in PR reviews as in stakeholder workshops.
17 years of coding experience
11 years of employment as a software developer
B.A.(Environmental Information), Infomation Media Studies, B.A.(Environmental Information), Infomation Media Studies at Musashi Institute of TechnologyMaster of Media and Governance, Human Computer Interaction, Master of Media and Governance, Human Computer Interaction at Keio University, Graduate School of Media and Governance.
Chinese, Japanese
Github Skills (200)
react-leaflet10
openmaptiles10
llama10
nodejs10
intellij10
mapbox-gl-js10
llm10
command-line10
windows10
bash10
hosting10
jetbrains10
tile-server10
makefile10
vector10
Programming languages (27)
Github contributions (5)
yuiseki/mapprint
Mar 2021 - Apr 2024
Contributions:10 PRs, 22 pushes, 11 branches in 3 years 1 month
yuiseki/openstreetmap-website
Nov 2022 - Feb 2024
The Rails application that powers OpenStreetMap
Contributions:40 pushes, 3 branches in 1 year 3 months
railspowersrails-applicationrubyopenstreetmap
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