Ryuichi Hayashida is a Senior Project Manager based in Tokyo with 14 years of experience delivering customer-facing applications from pre-sales through service launch. He blends hands-on engineering skills—contributing to prominent open-source projects like Neovim, vim, wasm-bindgen, and clap—with program management and delivery ownership at XXXX Co., Ltd. Comfortable across stacks, his contributions span TypeScript, Rust, C, WebAssembly, and editor tooling, often improving performance, UX, and CI automation. He has a knack for practical tooling: continuous benchmarking GitHub Actions, editor plugins, and CLI/packaging enhancements that make developer workflows more reliable. Colleagues know him as a meticulous refactorer who reduces allocations, tightens tests, and documents behavior, and as someone who enjoys software development with a sense of humor (and the occasional bug) like a dog at play.
GitHub Action for continuous benchmarking to keep performance
Role in this project:
Full-stack Developer
Contributions:23 releases, 1 review, 353 commits in 1 year 11 months
Contributions summary:Ryuichi primarily contributed to the development and maintenance of a continuous benchmarking tool implemented as a GitHub Action. Their work involved using TypeScript, integrating with GitHub Actions for CI purposes, and implementing new tools for benchmarking like Go and Benchmark.js. The user was also responsible for refactoring the documentation and updating the styling of the default HTML results to make the benchmark results easier to view and improve their readability.
Vim plugin for clang-format, a formatter for C, C++, Obj-C, Java, JavaScript, and so on.
Role in this project:
Full-stack Developer
Contributions:9 reviews, 270 commits, 25 PRs in 8 years 5 months
Contributions summary:Ryuichi primarily contributed to the development of a Vim plugin for clang-format. Their work included adding core functionality by implementing the initial operator function, refactoring the code to use vimproc for performance, and implementing logic for handling code formatting. They also added features such as custom arguments and style options and improved error handling. Their contributions involved the core logic of the plugin with focus on integration with external tools like clang-format.
clangvimclang-formatjavascriptvim-plugin
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Ryuichi Hayashida - Senior Project Manager at XXXX Co., Ltd.