mahiro
Software Engineer
Hi, I'm mahiro.
I work as a backend engineer at a major tech company in Japan. My main responsibilities include designing, developing, and operating microservices and API Gateways using Go.
On the side, I serve as a technical advisor for multiple AI startups, where I'm involved in a wide range of activities from service design and code reviews to project management and organizational design. I also have experience as an SRE building SaaS infrastructure, gaining practical experience across the full stack from upstream to downstream.
Links
Work
ZOZO, Inc.
2023/04 - PresentFull-time Backend Engineer / Developing core APIs and API Gateway using Go
Bit Blend LLC
2025/03 - PresentTech Lead / Development, technical validation, and architecture support for AI/IT startups
Prefab Inc.
2025/03 - PresentTechnical Advisor / Architecture design and code review for construction industry AI applications
STAR UP Inc.
2024/09 - 2025/06 (On break)Technical Advisor / Reviewing technical designs for manufacturing-related generative AI services
SPARQ Inc.
2024/08 - 2025/06 (On break)SRE / Building infrastructure and application monitoring systems
AI VOLT Inc.
2023/10 - 2025/08Tech Lead / Backend development, PM, and operations for generative AI services
CoPalette Inc.
2023/05 - 2024/02Co-founder & Director / Developed HR management SaaS APIs using Go
ispec Inc.
2023/01 - 2023/03Backend Engineer / API development using Go
Knowledge Work Inc.
2023/03Internship / Built a static analysis tool in Go to verify architecture dependency rule compliance
PLAID Inc.
2022/08 - 2023/03Backend Engineer Intern / API development and SRE tasks in Message team
Sansan, Inc.
2022/09Internship / Hackathon
GMO Internet Group
2022/04 - 2022/05DevSecOpsThon / Physical server setup and tuning
SOU Inc.
2021/04 - 2022/07Full-stack Engineer / System design and development
teamLab Inc.
2022/03Frontend Engineer Intern / Feature development and testing
Cookpad Inc.
2021/09Internship / Worked on assignments using Ruby and GraphQL
Education
Doshisha University
2019/04 - 2023/03Studying Statistics, Machine Learning, and Data Science
Do'er
2022/03 - 2023/03Engineering community for Doshisha University / Core member / Currently an alumni member
42Tokyo
2022/04 - 2023/03Working on implementing libc and printf
Skills
Frontend
TypeScript, React, Next.js, Vue.js
Backend
Go, Python, FastAPI, Flask, Node.js, Java
Infrastructure / DevOps
GCP, AWS, Azure, Docker, Kubernetes, PostgreSQL, MySQL, Redis, BigQuery, Datadog, Sentry
Others
Microservices, DDD, C, Operating System