
Takumi Mizuno
Software Architect / Engineer
Profile
Experienced in backend development and SRE at an SI company and Toyota Motor Corporation, followed by product management and full-stack development of an AI text editor at a startup. Since January 2026, building the data platform for the World History Database at COTEN: GraphQL APIs, data import pipelines, dbt-based data transformation, and AI-agent-driven development workflows.
Responsible for a wide range of development processes including client negotiation, requirements definition, design, implementation, testing, and operations. Specialized in DDD-based application architecture and in designing development processes built around generative AI.
Job Summary
| Position | Company | Duration | Employment Type |
|---|---|---|---|
| Software Architect / Developer Data Platform Engineer | COTEN | 2026/1 - Present | Permanent (full-time) |
| Application Architect / Developer Product Manager | STUDIO EURYGRAPH | 2022/3 - Present | Outsourcing (full-time 2025/4 - 2025/12) |
| Application Architect / Developer Cloud Architect / Developer | Toyota Motor Corporation | 2022/9 - 2023/2 | Permanent (full-time, 在籍出向) |
| Application Architect / Developer Cloud Architect / Developer Tech Lead / Project Leader | Cloud Ace | 2021/4 - 2025/3 | Permanent (full-time) |
Software Architect / Developer
Data Platform Engineer
Company
COTENDuration
2026/1 - Present
Employment Type
Permanent (full-time)
Application Architect / Developer
Product Manager
Company
STUDIO EURYGRAPHDuration
2022/3 - Present
Employment Type
Outsourcing (full-time 2025/4 - 2025/12)
Application Architect / Developer
Cloud Architect / Developer
Company
Toyota Motor CorporationDuration
2022/9 - 2023/2
Employment Type
Permanent (full-time, 在籍出向)
Application Architect / Developer
Cloud Architect / Developer
Tech Lead / Project Leader
Company
Cloud AceDuration
2021/4 - 2025/3
Employment Type
Permanent (full-time)
Expertise
Client Communication
Smooth communication with clients
Requirements Definition
Converting business requirements to technical specifications
Application Design
Architecture design including DDD, Microservices, and data pipelines
Documents
Awards
Google Cloud Partner Top Engineer 2025
Individual recognition award
Good Design Award 2024
Product design excellence and social impact evaluation