Masayoshi Takahashi
Programmer at Tatsu-zine publishing
Tokyo, Japan
Summary
🤩
Rockstar🎓
Top SchoolMasayoshi Takahashi is a seasoned programmer based in Tokyo with 17 years of experience building and maintaining backend systems, particularly in Ruby and C environments. He has led web application development teams and currently applies his skills at Tatsu-zine publishing after a long tenure at Twinspark. A pragmatic open-source contributor, Masayoshi improved internationalization and UTF-8 support in the widely used EPUBCheck project and enhanced mruby integration for the high-performance H2O HTTP server. His contributions to mruby core and Re:VIEW show a knack for low-level robustness—fixing compiler warnings, memory allocation issues, and adding string/IO primitives. He combines hands-on bug fixes and refactors with practical feature work like slug generation and improved localization, making systems more reliable and globally usable. Collected from a master’s in Information Engineering at Hokkaido University, his profile reflects deep attention to portability and multilingual correctness that often goes unnoticed.
17 years of coding experience
7 years of employment as a software developer
master, Information Engineering, master, Information Engineering at Hokkaido University
Github Skills (32)
epub10
strings10
restructuredtext10
text-manipulation10
rails10
c1110
bundle10
java10
ruby10
c1710
javas10
http-server10
localization10
latex10
rack10
Programming languages (23)
Github contributions (5)
kmuto/review
May 2010 - Oct 2022
Re:VIEW is flexible document format/conversion system
Role in this project:
Back-end Developer
Back-end DeveloperContributions:42 releases, 50 reviews, 1910 commits in 12 years 7 months
Contributions summary:Masayoshi implemented features for parsing and reading content in Re:VIEW, adding support for handling paragraph separators, quotations, and mainmatter. They also introduced and refined inline markup handling, specifically for LaTeX-based elements such as horizontal rules and the referencing of chapters and tables. Furthermore, the user contributed to the compiler's core functionalities, integrating features for table generation, and improving the overall rendering process.
converterpdfconversionmarkdownflexible
w3c/epubcheck
Nov 2013 - Jan 2019
The conformance checker for EPUB publications
Role in this project:Back-end Developer
Back-end DeveloperContributions:25 commits, 14 PRs, 11 comments in 5 years 2 months
Contributions summary:Masayoshi's contributions primarily focused on improving the robustness and internationalization of the EPUBCheck tool. They fixed locale-sensitive tests and implemented UTF-8 support for message bundles. Furthermore, the user refactored the code to use ResourceBundle for message retrieval, improving the tool's ability to handle multiple languages. The user also made changes to ensure that the mimetype file is not compressed.
publishingpdfepub-publicationscheckerconformance
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