Takumi Mizuno

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

Software Architect / Developer

Data Platform Engineer

Company

COTEN

Duration

2026/1 - Present

Employment Type

Permanent (full-time)

Application Architect / Developer

Product Manager

Duration

2022/3 - Present

Employment Type

Outsourcing (full-time 2025/4 - 2025/12)

Application Architect / Developer

Cloud Architect / Developer

Duration

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 Ace

Duration

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