m@taiki.dev
Taiki is a software engineer with a decade in platform engineering and developer productivity. He designs platforms that absorb complexity, so product teams can move fast with quality and security built in.
Recently, at enechain, he designed and built a PR preview environment platform shared across products and shared its design lessons at Platform Engineering Kaigi. At Finatext, he built open-source tools for organization-wide CI/CD and security on GitHub. Earlier, at Cookpad, his team led the migration from what was then the world's largest Rails monolith to microservices. He owned service-to-service communication with an Envoy-based service mesh, contributing upstream and presenting at EnvoyCon.
Platform Engineering team. Builds and operates the Kubernetes platform that product teams develop and run on — routing infrastructure, developer productivity, and system reliability. Designed and built prothea, a company-wide PR preview environment platform, and leads technical decisions across teams, beyond the platform. Spoke at Platform Engineering Kaigi 2026 on designing platforms that absorb developers' cognitive load, drawing on prothea.
Platform team. Drove technical direction for developer productivity tools and security / compliance infrastructure across the GitHub organization — monorepo CI/CD, organization-wide GitHub Actions workflows, and secret scanning tooling. Open-sourced several of these tools (orgu, gha-fix, gls). Spoke at Platform Engineering Kaigi 2024 on platform for security and compliance.
Discretionary short-term trading on Tokyo Stock Exchange small-caps, plus Nikkei 225 futures, crypto, and commodities — combining intraday execution with a longer-term macro view.
Consulting on service mesh and Kubernetes networking — research, design, and review.
Envoy data-plane work, mostly on the GetEnvoy project — Bazel build pipeline for distributing Envoy binaries and packages, plus AWS App Mesh integration.
Developer Productivity team. Together with the Infrastructure team, led Cookpad's migration from its Rails monolith — at the time the world's largest, with 200+ engineers and 90M monthly active users — to microservices by building the application platform: service-to-service communication, authentication and authorization, core libraries, and CI/CD.
Owned service-to-service communication: built and operated an in-house service mesh on Envoy, contributing upstream and presenting at EnvoyCon 2018. Took over and led the authentication and authorization service, building its custom DB sharding for high scalability.
Mobile online game on an in-house game engine — front-end and back-end (over 1 million users). Built and improved the development / release workflow and CI/CD tool chain.
Online game back-end development. Built tool chains supporting game development.