Takuma Yamamoto
CEO at Orecon
Greater Osaka Area Japan
Summary
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SeniorTakuma Yamamoto is a founder-CEO and hands-on technologist with 11 years leading Orecon and consulting over 3,278 companies on data-driven web design, microcopy, and conversion optimization. He pioneered microcopy workshops in Japan since 2017, running A/B tests for more than 2,364 e-commerce clients and delivering measurable results—clients have seen up to 50% conversion lifts and multi-million-yen revenue gains. Beyond consultancy, he has executed 1,663 case studies domestically and internationally and runs Darkpatterns.jp to combat deceptive UX practices. A developer at heart, he contributes to open-source Rust projects—improving parsers and image decoding error handling—while professionally using C/C++ and expressing a fondness for XML. Based in the Greater Osaka Area, he blends product-level experimentation with low-level engineering, uniquely coupling behavioral design expertise with production-grade systems work.
11 years of coding experience
Github Skills (25)
markdown10
parserator10
deco10
parser10
bmp10
decode10
webp10
jpeg10
markdown-it10
commonmark10
encoding10
encode10
error-handling10
rust10
tga10
Programming languages (17)
Github contributions (5)
pulldown-cmark/pulldown-cmark
Nov 2021 - May 2022
An efficient, reliable parser for CommonMark, a standard dialect of Markdown
Role in this project:
Back-end Developer
Back-end DeveloperContributions:14 reviews, 5 commits, 3 PRs in 6 months
Contributions summary:Takuma primarily contributed to the development of the CommonMark parser, enhancing its functionality. They introduced features for parsing and converting heading attribute blocks, adding fields for ID fragments and classes to headings. Furthermore, the user refactored the build process by sorting auto-generated test modules. These changes indicate a focus on improving the parser's capabilities and maintainability.
commonmarkmarkdownparserrust
image-rs/image
Feb 2020 - Feb 2020
Encoding and decoding images in Rust
Role in this project:Back-end Developer
Back-end DeveloperContributions:14 commits, 8 PRs, 11 comments in 2 days
Contributions summary:Takuma primarily focused on improving error handling within the `image-rs/image` repository, specifically related to image decoding and encoding. Their commits involved the implementation of detailed error messages for various image formats such as BMP, JPEG, TGA, WebP, DDS, and PNM. The user's contributions include modifying existing code to incorporate more informative error types and messages.
decodingdecoding-imagesrustencodingpixel
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