Trilingual Senior Platform & Infrastructure Engineer with a proven track record of accelerated promotion, specializing in the architecture of developer platforms and infrastructure at massive scale. Expertly resolved organizational deadlocks, unblocked global OS migrations for over 4,000 developers, and managed 60,000+ server fleets. Combines deep hands-on engineering expertise in Python ecosystem management and infrastructure automation with strong cross-cultural team leadership.
Platform Engineer (Contract)
Tokyo, Tokyo, Japan
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Summary
Architected an organization-wide Python interpreter resolution policy for 4,000+ developers, decoupling Python from OS upgrade lifecycles to unblock global OS migrations with zero developer disruption.
Highlights
Architected and implemented a sane-default Python interpreter resolution layer for 4,000+ developers across heterogeneous monorepos (Bazel, Poetry, ad-hoc scripts).
Decoupled Python from OS upgrade lifecycles, successfully unblocking global OS migrations for a large developer base without disruption.
Senior Infrastructure Engineer
Tokyo, Tokyo, Japan
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Summary
Selected for merit-based promotion to Grade A (P4 / Senior Level) following a 2025 year-end performance review, recognized for leadership in hardware lab and decommissioning projects.
Highlights
Achieved merit-based promotion to Grade A (P4 / Senior Level) after demonstrating exceptional leadership in critical hardware lab and decommissioning initiatives.
Drove significant contributions to strategic infrastructure projects, leading to recognition in the 2025 year-end performance review.
Infrastructure Engineer
Tokyo, Tokyo, Japan
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Summary
Spearheaded the 0-to-1 development of an isolated hardware lab for pre-purchase benchmarking, taking full responsibility for architectural evolution, procurement, and automated testing.
Highlights
Spearheaded the 0-to-1 development of an isolated hardware lab for pre-purchase benchmarking, serving as Lead Designer and Owner for architectural evolution and automated testing.
Architected and implemented an end-to-end standardized server decommissioning workflow, adopted as the organizational standard, retiring 5,000+ legacy servers.
Achieved monthly savings of millions of yen by efficiently retiring 5,000+ legacy servers and mentored a successor to ensure long-term operational continuity.
Owned and maintained an internal automation framework repository (200k+ lines of Python/Config), performing root-cause analysis (RCA) on complex infrastructure failures to streamline global operations for multiple internal teams.
Associate Infrastructure Engineer
Tokyo, Tokyo, Japan
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Summary
Engineered and improved various automation pipelines for provisioning and configuration management of a 60,000+ server global Bare-Metal-as-a-Service (BMaaS) platform.
Highlights
Engineered and improved automation pipelines (Python, Bash, Jenkins) for provisioning and configuration management (Chef Infra) of a 60,000+ server global BMaaS platform.
Refactored the Python-based Chef cookbook delivery system, eliminating race conditions and non-deterministic behavior, reducing daily synchronization time by 12x (from 6h to 30m).
Reduced server provisioning errors from 30% to 10% by engineering automated firmware upgrades and hardware/network health-check workflows, significantly increasing deployment reliability.
Back-End Engineer (Internship)
Remote, Japan, Japan
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Summary
Implemented a circuit-breaker pattern in a Go microservice to enhance resilience and prevent cascading failures, ensuring service availability.
Highlights
Implemented a robust circuit-breaker pattern in a critical Go microservice, significantly enhancing system resilience and preventing cascading failures.
Contributed directly to improved service availability and stability by integrating advanced error handling mechanisms.
AI Program Teaching Assistant
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Summary
Facilitated student mastery of API architecture and development environments for enhanced technical fluency.
Highlights
Mentored students in API architecture and development environments, significantly enhancing their technical fluency and problem-solving skills.
Provided hands-on support and guidance, contributing to improved comprehension and practical application of complex AI concepts.
Mathematics Instructor
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Summary
Instructed a class of 30 international students, preparing them for university entrance exams.
Highlights
Instructed a class of 30 international students, successfully preparing them for rigorous university entrance examinations.
Developed and delivered comprehensive mathematics curriculum, leading to improved student performance and readiness for higher education.
Culture Festival Preparation Committee Member
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Summary
Contributed to the planning and execution of the annual university culture festival.
Highlights
Collaborated with a team to plan and execute a successful university culture festival, enhancing campus community engagement.
Projection Mapping Club Member
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Summary
Participated in the Projection Mapping Club, developing creative visual installations.
Highlights
Developed and implemented creative projection mapping installations, showcasing technical and artistic skills.
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B.E.
Computer Science and Engineering
Grade: 3.88
Courses
Research Topic: Code-switching data generation for training Natural Language Processing models
Highest GPA in major
Awarded By
Kwansei Gakuin University
Recognized for achieving the highest GPA within the Computer Science and Engineering major.
Awarded By
Kwansei Gakuin University
Awarded for demonstrating exceptional academic performance with the highest GPA during the academic year.
Awarded By
Sato Yo International Scholarship Foundation (SISF)
Received a scholarship supporting self-supporting students based on academic merit and financial need.
Published by
Australasian Language Technology Association
Summary
Presented research on 'Generating Code-Switched Text from Monolingual Text with Dependency Tree', contributing to advancements in Natural Language Processing.
Issued By
Amazon Web Services (AWS)
Issued By
Audinate
Issued By
IPA
Issued By
ETS
Issued By
IPA
Issued By
ETS
Issued By
JEES
Linux (RHEL/Debian), Bare-Metal-as-a-Service (BMaaS), Server Hardware & Lifecycle Management, On-premise Private Cloud.
Bazel, Chef Infra, Ansible, Jenkins, GitHub Actions, Docker, Developer Tooling.
Python, Bash, Go, Ruby, C++.
AtCoder, C++.
API Design, Development Environments.
Technical Training, Curriculum Development, Student Support.