About

English follows Japanese.

プロフィール概要

  • ソフトウェアエンジニアとして： 10 年以上の経験
    • そのうち、Site Reliability Engineer (SRE)： 4 年以上の実績
  • マネジメント経験： 直近は Vice President of Engineering として、スタディサプリの事業課題の解決に取り組んでいます
    • そのうち Engineering Manager： 2 年以上の実績
    • Director of Engineering: 2 年以上の実績
    • Vice President of Engineering: current
  • 専門分野： オンプレミスからクラウド環境、IaC、Container Orchestration、Observability、Incident Management、Generative AI/LLM
  • その他の強み： オンボーディングプロセスの整備、技術コミュニティやカンファレンス運営など、技術外のカルチャーメイキングにも注力

経歴サマリー

  • マネジメント：

    • 開発部長として、100 名以上のエンジニア組織の組織課題解決、技術戦略の策定・実行、Engineering Manager のキャリア支援を実施
    • 最大 15 名、3 チームのマネジメント経験あり

  • 技術力：

    • On-Premise 環境（ハード・ネットワーク・ストレージ）と Cloud 環境の両面に精通
    • IaC、Container Orchestration による自動化・運用改善を推進
    • SRE として、Observability や Incident Response/Management、SLI/SLO の導入による組織改革を実施

  • 個人としての強み：

    • 個々のエンジニアが成果を出せるよう、ツールや自動化ソリューションの実装をリード
    • 技術外の取り組み（オンボーディング、コミュニティ活動、カンファレンス運営）でカルチャー作りに寄与

職務経歴

株式会社リクルート (Oct. 2021 ~ Present)

Vice President of Engineering, StudySapuri (Apr. 2026 ~ current)

スタディサプリの事業課題の解決に取り組んでいます。

Director of Engineering, StudySapuri K12 & English (Apr. 2025 ~ Mar. 2026)

スタディサプリ小学・中学・高校・大学受験講座に加え、English（社会人向け）プロダクトも担当

生成 AI のプロダクト開発への導入や他組織の技術支援を担当。

Director of Engineering, StudySapuri K12 (Oct. 2023 ~ Mar. 2025)

主な業務：

Engineering Manager, Site Reliability / Web Application Development (Oct. 2022 ~ Sep. 2023)

Engineering Manager, Site Reliability (Oct. 2021 ~ Sep. 2022)

Quipper Limited (Jun. 2018 ~ Sep. 2021)

Lead Software Engineer, Site Reliability (Jun. 2020 ~ Sep. 2021)

Software Engineer, Site Reliability (Jun. 2018 ~ Jun. 2020)

  • 業務内容：
    • Monolith から Microservice Architecture への移行後の Production Readiness プロセス構築
    • SLI/SLO 導入：
      • 全プロダクトチームに対して SLI/SLO の計測・定義のカルチャーを確立
    • その他の貢献：
      • Envoy proxy 導入による Circuit Breaker 改善
      • Kubernetes、Terraform、Ansible などを用いた Cloud Infrastructure の管理

富士通株式会社 (Apr. 2014 ~ Jun. 2018)

Software Engineer

Public Cloud IaaS K5

  • MariaDB Galera Cluster のダウンタイム最小化を実現する Upgrade 手法の提案
  • OpenStack IaaS コンポーネント（Nova, Cinder, Glance, Keystone, Heat）のバグ修正
  • IaaS コンポーネントの無停止保守ツールの開発
  • OpenStack の CI/CD 環境の構築とチームへの導入支援

ServerView Resource Orchestrator

  • ストレージコンポーネントの開発および修正

学歴

資格

Career Summary

  • Software Engineering: Over 10 years of experience
    • SRE: 4+ years
  • Leadership: Currently working as Vice President of Engineering to solve business challenges of StudySapuri.
    • Engineering Manager: 2+ years
    • Director of Engineering: 2+ years
    • Vice President of Engineering: current
  • Expertise:
    • Skilled in both on-premise (hardware, network, storage) and cloud environments
    • Proficient in IaC, container orchestration, Observability, and Incident Management
  • Additional Strengths:
    • Implementation of onboarding processes and culture initiatives
    • Active involvement in technical communities and conference organization

Professional Summary

  • Leadership:
    • As Vice President of Engineering, working on solving business challenges of StudySapuri.
  • Technical Expertise:
    • Extensive experience with on-premise and cloud environments, automation via IaC, and container orchestration.
    • Proven track record in implementing SLI/SLO as a core theme for both Japanese and global products.
  • Team & Project Leadership:
    • Adept at identifying issues and driving teams forward through effective communication and facilitation.

Career

Recruit Co., Ltd. (Oct. 2021 ~ Present)

Vice President of Engineering, StudySapuri (Apr. 2026 ~ current)

Working on solving business challenges of StudySapuri.

Director of Engineering, StudySapuri K12 & English (Apr. 2025 ~ Mar. 2026)

In addition to StudySapuri Elementary, Junior High, High School, and University Entrance Exam courses, also responsible for the English (for adults) product.

Led the introduction of generative AI into product development and provided technical support to other organizations.

Director of Engineering, StudySapuri K12 (Oct. 2023 ~ Mar. 2025)

Key Responsibilities:

Engineering Manager, Site Reliability / Web Application Development (Oct. 2022 ~ Sep. 2023)

  • Role:
    • Responsible for ensuring the reliability of StudySapuri (Japan) and Quipper (Global).
    • Managed the development team for StudySapuri New Junior High School Course.

Engineering Manager, Site Reliability (Oct. 2021 ~ Sep. 2022)

Quipper Limited (Jun. 2018 ~ Sep. 2021)

Lead Software Engineer, Site Reliability (Jun. 2020 ~ Sep. 2021)

Software Engineer, Site Reliability (Jun. 2018 ~ Jun. 2020)

  • Responsibilities:
    • Led the transition from a monolithic application to a microservices architecture with an emphasis on production readiness.
    • Established processes such as service ownership definition, Design Doc Reviews, and Production Readiness Checklists.
    • Introduced an SLO review culture across product teams.
    • Additional contributions:
      • Improved circuit breakers via Envoy proxy, and managed cloud infrastructure using code (Kubernetes, Terraform, Ansible, etc.).

Fujitsu Limited (Apr. 2014 - Jun. 2018)

Software Engineer

  • Public Cloud IaaS K5:
    • Proposed upgrade methods for MariaDB Galera Cluster minimizing downtime.
    • Bug fixes and maintenance for OpenStack IaaS components (Nova, Cinder, Glance, Keystone, Heat).
    • Developed tools for zero-downtime maintenance and introduced CI/CD practices.
  • ServerView Resource Orchestrator:
    • Contributed to feature enhancements and bug fixes for IaaS management software.

Education

Certification