@deeeet

Father of twins. CTO @mercari_inc. Podcast at @e34fm

 Tokyo-to, Japan
deeeet.com/
Joined February 2010
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2.4KMedia
本日7月1日付でメルカリのCTO Japan Businessに就任しました． これまではSRE / Platform Engineeringとして技術基盤を，そして直近は越境事業において海外展開をエンジニアリングからリードしてきました．今後はCTOとしてJapan Business全体の技術戦略をリードしていきます．「組織と人」の面からAI-Native化を進めるCHRO/CAIOの @kimuras さ んと，「ものづくり」の面から連携しつつ，メルカリのAI-Native化をさらに進めていきます． AIを前提とした新しい開発体制へと移行すること，そしてAIが最大限に力を発揮できるように，これまで作ってきた技術基盤とアーキテクチャそのものを作り変えていくこと，この2つを軸にものづくりのAI-Native化を推進していきます．そして越境事業を軸としたグローバルへの展開とそのための基盤の整備も引き続きリードしていきます． よろしくお願いします!
株式会社メルカリ
@mercari_incJul 1
株式会社メルカリ（以下、メルカリ）は、2026年7月1日付で、執行役員 VP of Engineering Cross Borderの中島大一が、執行役員 CTO Japan Business, VP of Engineering Marketplace New Businessに就任いたしましたので、お知らせいたします。 2026年6月1日付でCHRO（最高人事責任者） 兼 CAIO（最高AI責任者）に就任した木村俊也の後任として中島がCTOに就任いたします。CHRO 兼 CAIOの木村が「人と組織の運営基盤」をAI前提で再設計する役割に専念する一方、中島はCTOとして「ものづくりの基盤」をAI前提で再設計する技術変革を推進します。この2つを揃えることで、メルカリの「AI-Native Company」を一歩先の実行のフェーズに移行してまいります。 プレスリリース：about.mercari.com/press/news…

メルカリ、CTO Japan Businessに中島大一が就任

〜AIを活用した開発体制の変革と技術基盤の刷新により、”ものづくりのAI-Native化”を推進〜 株式会社メルカリ（以下、メルカリ）は、2026年7月1日付で、執行役員 VP of Engineering Cross Borderの中島大一が、執行役員 CTO Japan Business, VP of Engineering Marketplace New Businessに就任いたしま...

about.mercari.com
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メルカリにおけるTiKVオートスケールの実践 engineering.mercari.com/blog…

メルカリにおけるTiKVオートスケールの実践

本記事は、私たちメルカリのDBRE（Database Reliability Engineering）チームが先日公開した TiDB Cloudのオートスケール改善 – 時間帯別制御、TiKVへの拡張、運用の自動化 の後続記事で

engineering.mercari.com
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dev-null.sh/@tcnksm/commits/…

Taichi Nakashima (@tcnksm) on /dev/null: “Yo!”

Yo!

dev-null.sh
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How to scale intent, quality, and artistry with Al | Katie Dill (Stripe) youtu.be/GLvFTMtw4Jk?si=5l2I…

How to scale intent, quality, and artistry with Al | Katie Dill (Stripe)

As AI makes it easier to build, how do we keep products from becomi...

youtube.com
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“I want to feel the creator behind the software, not the factories.”
Taichi Nakashima
@deeeetOct 17
Someone behind the software karrisaarinen.com/posts/some…

Someone behind the software

I think good products carry something of the people who make them. Their experience, what they care about, and how they think things should work.

karrisaarinen.com
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Someone behind the software karrisaarinen.com/posts/some…

Someone behind the software

I think good products carry something of the people who make them. Their experience, what they care about, and how they think things should work.

karrisaarinen.com
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Taichi Nakashima retweeted
Zach Lloyd
@zachlloydtweetsOct 15
Software factories can be a real culture shift. The biggest change for us was moving from individual agents on everyone's machines to one central agent setup (a factory) that we can build as a team. I wrote some learnings on how to navigate that.

Tactics for rolling out software factories: human and organizational changes

Article · @zachlloydtweets
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The agentic development loop haydenbleasel.com/writing/ul…

The agentic development loop | Hayden Bleasel

How coding agents changed the way I build Ultracite: faster linting, stricter rules and fewer ways to bypass checks.

haydenbleasel.com
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OpenCode 2.0 anoma.ly/notes/opencode-2-0/

OpenCode 2.0

OpenCode 2.0.

anoma.ly
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Five principles for working with Loop linear.app/now/five-principl…

Five principles for working with Loops

How to turn recurring tasks into shared, reliable workflows.

linear.app
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How to effectively debug when you no longer understand the code copyconstruct.medium.com/how…

How to effectively debug when you no longer understand the code

“” is published by Cindy Sridharan.

copyconstruct.medium.com
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Taichi Nakashima retweeted
Satya Nadella
@satyanadellaOct 10

Models as Insider Risks in the Super Intelligence Era

Article · @satyanadella
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Taichi Nakashima retweeted
David Crawshaw
@davidcrawshawOct 11
The age of personal / pliable / malleable software is very hard to reason about because the last two centuries of industrialization has been about moving from the bespoke to the mass produced. Software started mass produced. Now you get it crafted to order. It’s backwards.
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Self-improving software is inevitable boristane.com/blog/self-impr…

Self-improving software is inevitable | Boris Tane

Production tells us exactly how to make our software better, we've just never had the tools to run this on auto-pilot.

boristane.com
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Agentが人間が明示的にやらないといけない操作 (ログインとか) を画面にデカい矢印出して指示できるようにするCLIツール面白いねgithub.com/franzenzenhofer/b…

GitHub - franzenzenhofer/big-arrow-on-the-screen: Let your AI agents paint big arrows, boxes and...

Let your AI agents paint big arrows, boxes and text on your Mac screen. One CLI, click-through, gone by itself. Skill for Claude Code and Codex. MIT. - franzenzenhofer/big-arrow-on-the-screen

github.com
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Taichi Nakashima retweeted
Tuomas Artman
@artmanOct 8
Software factory? I don't want to work at a factory. Do you?
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Strands Box: The Big Picture strandsagents.com/blog/stran…

Strands Box: The Big Picture

Strands Box, now in developer preview, is an open source local sandbox for AI agents that pairs operating-system isolation with Dogwood semantic policy. Here's why semantic policy matters, and how...

strandsagents.com
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ETOOMANYTHINGS? Run Fewer Agents blog.exe.dev/etoomanythings

ETOOMANYTHINGS? Run Fewer Agents - exe.dev blog

Spinning up more agents to hide latency wrecks your attention. Fix the human-agent loop instead.

blog.exe.dev
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The Harness Is the Company blog.sshh.io/p/the-harness-i…

The Harness Is the Company

Why SaaS business is now a harness one.

blog.sshh.io
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How I Find Problems to Solve as a Staff Engineer lalitm.com/post/find-problem…

How I Find Problems to Solve as a Staff Engineer

How listening broadly turns everyday problems into useful project ideas.

lalitm.com
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You Said No MCP! earendil.com/posts/you-said-…

“You Said No MCP!” | Earendil

Pi now supports MCP. Why we changed our minds, what changed in MCP and in Pi, and what Codemode is.

earendil.com
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